This is a verse from Bhagavad-gītā, fourth chapter, text number thirteen. Kṛṣṇa... The whole Bhagavad-gītā is bhagavata, means the Supreme Personality of Godhead, gītā, "spoken" or "sung." Gītā means "spoken by the Supreme Personality of Godhead," Bhagavad-gītā. Just like we speak, similarly God also speaks. We hear, God also hears. We eat, God also eats. Everything, as we do, Lord Kṛṣṇa, or the Supreme Personality of Godhead, He also does. The difference... Difference is that He does unlimitedly, we do limitedly. That's all. The functions are the same, but His functions, His activities, are unlimited, and our functions are limited.
(Lecture on Bhagavad-Gita----4:13).

Prabhupāda: Hmm. So here it is explained what is Bhagavad-gītā. Gītaṁ bhagavatā. Bhagavatā means "by the Supreme Personality of Godhead," and gīta means "spoken." They say "sung," you can say. But gīta means "spoken by." Therefore it is called Bhagavad-gītā, "the instruction given by the Supreme Personality of Godhead personally." Therefore it is called Bhagavad-gītā.
(Lecture on Srimad Bhagavatam---1:15:30).