Bhagavad-gītā As It Is · Text 4.5
Divine descent, Krishna’s nature and refuge
श्रीभगवानुवाच
बहूनि मे व्यतीतानि जन्मानि तव चार्जुन ।
तान्यहं वेद सर्वाणि न त्वं वेत्थ परन्तप ॥ ५ ॥
śrī-bhagavān uvāca
bahūni me vyatītāni
janmāni tava cārjuna
tāny ahaṁ veda sarvāṇi
na tvaṁ vettha paran-tapa
The Personality of Godhead said: Many, many births both you and I have passed. I can remember all of them, but you cannot, O subduer of the enemy!
Read Śrīla Prabhupāda's purport on Vedabase.io