Śatapatha Brāhmaṇa ("of a hundred paths") 2.1.3.9

2.1.3.9

te vā eta ṛtavaḥ | ubhaya evāpahatapāpmānaḥ sūrya evaiṣām pāpmano 'pahantodyannevaiṣāmubhayeṣām pāpmānamapahanti tasmādyadaivainaṃ kadā ca yajña upanamedathāgnī ādadhīta na śvaḥśvamupāsīta ko hi manuṣyasya śvo veda

[In the opinion of others] both these (classes of) seasons have the evil dispelled from them, for the sun is the dispeller of their evil, and as soon as he rises he dispels the evil from both these (classes of seasons). He should therefore set up his fires at any time, when he feels called upon to sacrifice; and should not put it off from one day to the morrow: for who knows the morrow of man?