Kurmapurana 2.33.97

Kūrmapurāṇa 2.33.97

kṛṣṇāṣṭamyāṃ mahādevaṃ tathā kṛṣṇacaturdaśīm /
saṃpūjya brāhmaṇamukhe sarvapāpaiḥ pramucyate //