CC Antya 20.9
sei ta’ sumedhā pāya kṛṣṇera caraṇa
“In this Age of Kali, the process of worshiping Kṛṣṇa is to perform sacrifice by chanting the holy name of the Lord. One who does so is certainly very intelligent, and he attains shelter at the lotus feet of Kṛṣṇa.
For further information, one may refer to Ādi-līlā, chapter three, texts 77-78