Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 9
Sanskrit:
वत्सेषु वत्सरूपेण प्रविशन्तं जिघांसया । हत्वा न्यपातयत्तेन कपित्थानि च लीलया ॥ ९ ॥
ITRANS:
vatseṣu vatsa-rūpeṇapraviśantaṁ jighāṁsayāhatvā nyapātayat tenakapitthāni ca līlayā
Translation:
Desiring to kill Kṛṣṇa, the demon Vatsa disguised himself as a calf and entered among Kṛṣṇa’s calves. But Kṛṣṇa killed the demon and, using his body, enjoyed the sport of knocking kapittha fruits down from the trees.