Śatapatha Brāhmaṇa ("of a hundred paths") 1.9.2.4

1.9.2.4

antareṇo haiva patnīṃ | ekeṣāmadhvaryureti no eva tathā kuryādantariyāddha yajñātpatnīṃ yatteneyāttasmādu pūrveṇaiva gārhapatyamantareṇāhavanīyaṃ caiti tathā ha na bahirdhā yajñādbhavati yatho evādaḥ pracarannantareṇa saṃcarati sa u evāsyaiṣa saṃcaro bhavati

According to others, the Adhvaryu passes between the wife (and the Gârhapatya fire). Let him not, however, do this either; for were he to pass that way, he would cut off the wife from the sacrifice. Along the east side of the Gârhapatya and the inner side of the Âhavanîya (he passes); for thus he is not outside the sacrifice; and as before, in walking forward (to the Âhavanîya), he passed along the inner side, so he now also takes that path.