Skandapurana 6.3.198.42

6.3.198.42

dināni yāvanti vasetsa kaṣṭe yathākṛtaṃ cintayaddevamīśam .
tāvanti saumyāni kṛtāni tena bhavanti vipra śrutinodanaiṣā .. 198.42 ..

For as many days as he may dwell in hardship, meditating upon God, the Lord, in accordance with what he has done, / so many [days] are rendered benign by Him; O brahmin, this is the command of the Veda.