Devibhagavatapurana 7.20.22

7.20.22

rājovāca - brahmannādyāpi sampūrṇo māso jñānatapobala |
tiṣṭhatyekadinārdhaṃ yattapratīkṣasva nāparam ||

The King said:-- “O Brâhmana! You are wise and are endowed with the power of tapas (asceticism); as yet one month is not complete; still half a day is remaining; wait till then; and no longer.”