Śatapatha Brāhmaṇa ("of a hundred paths") 13.2.9.9

13.2.9.9

apa vā etebhyaḥ prāṇāḥ krāmanti ye yajñe'pūtāṃ vācaṃ vadanti dadhikrāvṇo akāriṣamiti surabhimatīmṛcamantato'nvāhurvācameva punate naibhyaḥ prāṇā apakrāmanti

But, indeed, the vital airs pass from those who speak impure speech at the sacrifice. [The queen consort having been made to rise by her attendants, the priests and chamberlain say, Vâg. S. XXIII, 32, Rig-v. S. IV, 39, 6,] 'The praises of Dadhikrâvan have I sung, (the victorious, powerful horse: may he make fragrant our mouths, and prolong our lives!),'--thus they finally utter a verse containing the word 'fragrant': it is (their own) speech they purify, and the vital airs do not pass from them.