Varaha Purana 48.21

भवोदधिनिमग्नेन वाराहः पूज्यते हरिः । नारसिंहेन रूपेण तद्वत् पापभयाद् नरैः ॥ ४८.२१ ॥

bhavodadhinimagnena vārāhaḥ pūjyate hariḥ | nārasiṁhena rūpeṇa tadvat pāpabhayād naraiḥ || 48.21 ||

One who has sunk into the ocean of worldly becoming (saṁsāra) should venerate Hari in the form of Varāha; likewise, men afflicted by fear of sin should venerate him in the form of Narasiṁha.