Chapter 6 · verse 43 · gita.yoga.org

Bhagavad Gita 6.43

तत्र तं बुद्धिसंयोगं लभते पौर्वदेहिकम्। यतते च ततो भूयः संसिद्धौ कुरुनन्दन

Then he comes into contact with the knowledge acquired in his former body and strives even more for perfection, O Arjuna.