Bhagavatapurana 10.84.18

10.84.18

athāpi kāle sva-janābhiguptaye bibharṣi sattvaṃ khala-nigrahāya ca /
sva-līlayā veda-pathaṃ sanātanaṃ varṇāśramātmā puruṣaḥ paro bhavān //

18. Still at times, for the protection of Thy people and for putting down the wicked, Thou assumest the pure Satvika form and by Thine own example maintainest the eternal Vedic path—Thou art the Highest Person, the embodiment of Varna and Asrama duties.