Bhagavatapurana 3.33.5

3.33.5

tvaṃ deha-tantraḥ praśamāya pāpmanāṃ nideśa-bhājāṃ ca vibho vibhūtaye /
yathāvatārās tava sūkarādayas tathāyam apy ātma-pathopalabdhaye //

5. O Lord, Thine assumption of a body is intended for the suppression of the wicked and for the exaltation (prosperity and protection) of those that abide by Thy commandments ; just as Thy Varāha and other Avatāras were for various purposes, so also is this Avatāra for imparting to the world the knowledge of the path leading to (the realisation of) Atman.