Matsyapurana 101.21

101.21

kṛtvopalepanaṃ śambhor agrataḥ keśavasya ca
yāvadabdaṃ punardadyād dhenuṃ jalaghaṭānvitām //

One who washes the floor in front of Viṣṇu or Śiva for a full year and then gives away a cow with a pitcher of water, is born a king on this earth, ten thousand times, and at the end goes to the realm of Śiva. This is known as (12) Âyur-Vrata, and is the giver of all desires.—21-22.