Śatapatha Brāhmaṇa ("of a hundred paths") 3.3.3.13

3.3.3.13

atha vācayati | pari māgne duścaritādbādhasvā mā sucarite bhajetyāsīnaṃ vā enameṣa āgacati sa āgata uttiṣṭhati tanmithyākaroti vratam pramīṇāti tasyo haiṣā prāyaścittistatho hāsyaitanna mithyākṛtam bhavati na vratam pramīṇāti tasmādāha pari māgne duścaritādbādhasvā mā sucarite bhajeti

He then makes (the sacrificer) say the text (Vâg. S. IV, 28), 'Keep me, O Agni, from evil ways! let me share in the right ways.' Now he (Soma) approaches him while he is seated, and when he has come, he rises: thereby he does wrong and breaks the vow. This, then, is his expiation of that (transgression), and thus no wrong is thereby done, and he breaks not the vow: therefore he says, 'Keep me, O Agni, from evil ways! let me share in the right ways!'