False ego means accepting this body as oneself. When one understands that he is not his body and is spirit soul, he comes to his real ego. Ego is there. False ego is condemned, but not real ego. In the Vedic literature (Bṛhad-āraṇyaka Upaniṣad 1.4.10) it is said, ahaṁ brahmāsmi: I am Brahman, I am spirit. This "I am," the sense of self, also exists in the liberated stage of self-realization. This sense of "I am" is ego, but when the sense of "I am" is applied to this false body it is false ego. When the sense of self is applied to reality, that is real ego. There are some philosophers who say we should give up our ego, but we cannot give up our ego, because ego means identity. We ought, of course, to give up the false identification with the body.
(Bhagavad-Gita--13:8-12---purport).

Materialistic ego, or the sense of identification with matter, is grossly self-centered, devoid of clear knowledge of the existence of God. And this self-centered egoism of the materialistic living entities is the cause of their being conditioned by the other paraphernalia and continuing their bondage of material existence.
(Srimad Bhagavatam---2:5:24---purport).

An important word in this verse is mukta-liṅgaḥ. Mukta means "liberated," and liṅga means "the subtle body." When a man dies, he quits the gross body, but the subtle body of mind, intelligence and ego carries him to a new body.
(Srimad Bhagavatam---4:12:18---purport).

No material planet, even Satyaloka, is comparable in quality to the spiritual planets, where the five inherent qualities of the material world—namely ignorance, misery, egoism, anger and envy—are completely absent.
(Sri Caitanya Caritamrta---1:5:22---purport).

Pradyumna: Swamiji, is there such thing as mind, intelligence, and ego on the spiritual realm?
Prabhupāda: Yes. Why not? Ego... I am thinking at the present moment ego falsely. "I am somebody belonging to this material world," either I may think that "I am American," either I think "I am Indian," something of this material world. But similarly, when you think ahaṁ brahmāsmi, "I am spirit soul," that is also aham, ahaṅkāra. Ego means ahaṅkāra, identification, self-identification, ahaṅkāra, "I am." Everyone has got the sense, "I am." Now, that "I am" thinking, at the present moment I am thinking in my material concept. So when I will think in spiritual concept, that is my pure ego, pure identification. So ego will remain. Ego will not vanish. This "I" consciousness will remain, but here, at the present moment, I am misidentifying myself, and when I actually know myself, that identification is pure ego.
(Lecture on Srimad Bhagavatam--2:1:2-5--Montreal--23rd. October, 1968).