Skanda Purana 17.18.258

17.18.258

jaya kṛṣṇa jagannātha jaya devakinandana ..
namāmi buddhaṃ kṛṣṇaṃ ca kalkinaṃ praṇamāmyaham ..258..

Victory, O Kṛṣṇa, Lord of the Universe! Victory, O son of Devakī! / I bow to Buddha and Kṛṣṇa, and I prostrate before Kalkin!”