For instance, we sometimes chant this mantra of Brahma-saṁhitā (5.29):
cintāmaṇi-prakara-sadmasu kalpa-vṛkṣa-
lakṣāvṛteṣu surabhīr abhipālayantam
lakṣmī-sahasra-śata-sambhrama-sevyamānaṁ
govindam ādi-puruṣaṁ tam ahaṁ bhajāmi
"I worship Govinda, the primeval Lord, the first progenitor, who is tending the cows, yielding all desires, in abodes built with spiritual gems and surrounded by millions of purpose trees. He is always served with great reverence and affection by hundreds of thousands of lakṣmīs, or gopīs." Because this prayer was offered by Lord Brahmā, we follow him by reciting this prayer.
(Srimad Bhagavatam----4:30:3----purport).

The goddess of fortune, Lakṣmī, and all-powerful demigods like Brahmā and Śiva are engaged in the worship of Viṣṇu or Lord Kṛṣṇa; therefore who can be more powerful than Mukunda (Lord Kṛṣṇa) to be factually called the Supreme Personality of Godhead? The goddess of fortune, Lakṣmījī, Lord Brahmā and Lord Śiva are not independently powerful; they are powerful as expansions of the Supreme Lord, and all of them are engaged in the transcendental loving service of the Lord, and so also are the living entities. There are four sects of worshipful devotees of the Lord, and the chief amongst them are the Brahma-sampradāya, Rudra-sampradāya and Śrī-sampradāya, descending directly from Lord Brahmā, Lord Śiva and the goddess of fortune, Lakṣmī, respectively. Besides the above-mentioned three sampradāyas, there is the Kumāra-sampradāya, descending from Sanat-kumāra.
(Srimad Bhagavatam----1:18:21----purport).

All the demigods and other living entities worship Lakṣmī, the goddess of fortune, just to get her favor, yet the Lord is never attached to her because He can create an unlimited number of such goddesses for His transcendental service. The goddess of fortune, Lakṣmī, is sometimes envious of the tulasī leaves which are placed at the lotus feet of the Lord, for they remain fixed there and do not move, whereas Lakṣmījī, although stationed by the chest of the Lord, sometimes has to please other devotees who pray for her favor. Lakṣmījīsometimes has to go to satisfy her numerous devotees, but tulasī leaves never forsake their position, and the Lord therefore appreciates the service of the tulasī more than the service ofLakṣmī. When the Lord says, therefore, that it is due to the causeless mercy of the brāhmaṇas that Lakṣmījī does not leave Him, we can understand that Lakṣmījī is attracted by the opulence of the Lord, not by the brāhmaṇas' benedictions upon Him.
(Srimad Bhagavatam----3:16:21----purport).

Lakṣmīdevī advises all devotees who approach the Lord with material desires that according to her practical experience, the Lord is Kāmadeva, and thus there is no need to ask Him for anything material. She says that everyone should simply serve the Lord without any motive. Since the Supreme Personality of Godhead is sitting in everyone's heart, He knows everyone's thoughts, and in due course of time He will fulfill all desires. Therefore let us completely depend on the service of the Lord without bothering Him with our material requests.
(Srimad Bhagavatam----5:18:21----purport).

The Lord has multifarious potencies (parāsya śaktir vividhaiva śrūyate (Cc. Madhya 13.65, purport)). Since mother Lakṣmī, the goddess of fortune, is the Lord's very precious potency, she is addressed here as mahā-māye. The word māyā means śakti. Lord Viṣṇu, the Supreme, cannot exhibit His power everywhere without His principal energy. It is said, śakti śaktimān abheda: the power and the powerful are identical. Therefore mother Lakṣmī, the goddess of fortune, is the constant companion of Lord Viṣṇu; they remain together constantly. One cannot keep Lakṣmī in one's home without Lord Viṣṇu. To think that one can do so is very dangerous. To keep Lakṣmī, or the riches of the Lord, without the service of the Lord is always dangerous, for then Lakṣmī becomes the illusory energy. With Lord Viṣṇu, however, Lakṣmī is the spiritual energy.
(Srimad Bhagavatam----6:19:6----purport).

"O best of the brāhmaṇas, Lakṣmījī is the constant companion of the Supreme Personality of Godhead, Viṣṇu, and therefore she is called anapāyinī. She is the mother of all creation. As Lord Viṣṇu is all-pervading, His spiritual potency, mother Lakṣmī, is also all-pervading. Lord Viṣṇu has three principal potencies—internal, external and marginal. Śrī Caitanya Mahāprabhu has accepted parā-śakti, the spiritual energy of the Lord, as being identical with the Lord. Thus she is also included in the independent viṣṇu-tattva."
(Srimad Bhagavatam----6:19:13----purport).

"Parīkṣit Mahārāja attained salvation simply by hearing, and Śukadeva Gosvāmī attained salvation simply by chanting. Prahlāda Mahārāja attained salvation by remembering the Lord. The goddess of fortune, Lakṣmīdevī, attained perfection by worshiping the Lord's lotus feet. Pṛthu Mahārāja attained salvation by worshiping the Deity of the Lord. Akrūra attained salvation by offering prayers, Hanumān by rendering service, Arjuna by establishing friendship with the Lord, and Bali Mahārāja by offering everything to the service of the Lord." All these great devotees served the Lord according to a particular process, but every one of them attained salvation and became eligible to return home, back to Godhead. This is explained in Śrīmad-Bhāgavatam.
(Srimad Bhagavatam----7:5:23-24----purport).

The goddess of fortune, Lakṣmī, is described in this verse as śriyam, which means that she has six opulences—wealth, strength, influence, beauty, knowledge and renunciation. These opulences are received from the goddess of fortune. Lakṣmī is addressed here as devī, the goddess, because in Vaikuṇṭha she supplies all opulences to the Supreme Personality of Godhead and His devotees, who in this way enjoy natural life in the Vaikuṇṭha planets. The Supreme Personality of Godhead is pleased with His consort, the goddess of fortune, who carries a lotus flower in her hand. Mother Lakṣmī is described in this verse as satī, the supremely chaste, because she never diverts her attention from the Supreme Personality of Godhead to anyone else.
(Srimad Bhagavatam----8:8:14----purport).

The word Mādhava is significant. Mā, mother Lakṣmī, the mother of all opulences, is always with the Supreme Personality of Godhead, and if a devotee is in touch with the Supreme Personality of Godhead, all the opulences of the Lord are ready to help him.
(Srimad Bhagavatam----10:2:23----purport).

Lord Viṣṇu lies there with the goddess of fortune, and it is said that during the four months of the rainy season He enjoys sleeping on that Śeṣa Nāga bed. East of Sumeru is the ocean of milk, in which there is a white city on a white island where the Lord can be seen sitting with His consort, Lakṣmījī, on a throne of Śeṣa. That feature of Viṣṇu also enjoys sleeping during the four months of the rainy season. The Śvetadvīpa in the milk ocean is situated just south of the ocean of salt water. It is calculated that the area of Śvetadvīpa is 200,000 square miles. This transcendentally beautiful island is decorated with desire trees to please Lord Viṣṇu and His consort.”
(Sri Caitanya Caritamrta-----1:5:112----purport).

Śrīla Rūpa Gosvāmī, in his Laghu-bhāgavatāmṛta, has quoted from the Padma Purāṇa, where it is stated that Lakṣmī-devī, the goddess of fortune, after seeing the attractive features of Lord Kṛṣṇa, was attracted to Him, and to get the favor of Lord Kṛṣṇa she engaged herself in meditation. When asked by Kṛṣṇa why she engaged in meditation with austerity, Lakṣmī-devī answered, "I want to be one of Your associates like the gopīs in Vṛndāvana." Hearing this, Lord Śrī Kṛṣṇa replied that it was quite impossible. Lakṣmī-devī then said that she wanted to remain just like a golden line on the chest of the Lord. The Lord granted the request, and since then Lakṣmī has always been situated on the chest of Lord Kṛṣṇa as a golden line. The austerity and meditation of Lakṣmī-devī are also mentioned in Śrīmad-Bhāgavatam (10.16.36), where the Nāga-patnīs, the wives of the serpent Kāliya, in the course of their prayers to Kṛṣṇa, said that the goddess of fortune, Lakṣmī, also wanted His association as a gopī and desired the dust of His lotus feet.
(Sri Caitanya Caritamrta----1:5:223----purport).

According to expert opinion, Lakṣmī, the goddess of fortune, is a subordinate expansion of Śrīmatī Rādhārāṇī. As Kṛṣṇa has numerous expansions of viṣṇu-mūrtis, so His pleasure potency, Rādhārāṇī, also has innumerable expansions of goddesses of fortune. Therefore the goddess of fortune, Lakṣmījī, is always eager to be elevated to the position of the gopīs.
(Krsna Book).