Garudapurana 2.4.1

2.4.1

śrīgaruḍamahāpurāṇam- 4
śrīkṛṣṇa uvāca /
jñānato 'jñānato vāpiyannaraiḥ kaluṣaṃ kṛtam /
tasya pāpasya śuddhyarthaṃ vidheyā niṣkṛtirnaraiḥ //

The glorious Garuḍa Mahāpurāṇa — [Chapter] 4
Śrī Kṛṣṇa said: / Whatever taint has been committed by men, knowingly or unknowingly, / for the purification of that sin, an expiation must be performed by men.