Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 2.p14

2.p14

ii. 9. ‘Should the offering be made when the sun has risen, or before it is risen?’ they debate. He who offers when the sun has risen thus offers hospitality to the great god when gone on a journey. He who offers when the sun has not risen, thus offers hospitality to the great god when close at hand. Therefore the offering should be made when the sun has not risen.