The first expansion is Balarama, Baladeva. And the next expansion is Sankarsana, Vasudeva, Aniruddha, Pradyumna. The next expansion is Narayana. The next expansion again second catur-vyuha. Sankarsana again. Dvitiya-catur-vyuha. Then next expansion, Visnu, Maha-Visnu. Next expansion, Garbhodakasayi Visnu. And next expansion is Ksirodakasayi Visnu. In this way, there are different expansion, but krsnas tu bhagavan svayam. Adyam purusam sasvatam. Krsna is the original person. Therefore Krsna says, mattah parataram nanyat [Bg. 7.7]. “I am not expansion of anybody.”
Lecture on Srimad-Bhagavatam 1.7.51-52, Vrindavan, October 8, 1976