Śatapatha Brāhmaṇa ("of a hundred paths") 9.3.3.4

9.3.3.4

atha yugmato juhoti | etadvai candāṃsyabruvanyātayāmā vā ayuja stomā yugmabhirvayaṃ stomaiḥ svargaṃ lokayayāmeti tāni yugmabhi stomaiḥ svargaṃ lokamāyaṃstathaivaitadyajamāno yugmabhi stomaiḥ svargaṃ lokameti

He then offers (those relating to) the Even (Stomas);--for the metres then said, 'The uneven stomas are worn out, by means of the even ones we will go up to heaven!' By means of the even stomas they went up to heaven; and in like manner does the Sacrificer thus, by means of the even stomas, go up to heaven.