Shatapatha Brahmana 6.8.1.12

6.8.1.12

sa yadi purā vasatyai vimuñceta | anasyevāgniḥ syādatha yadā vasatyai vimuñceta prāgana upasthāpyottarata uddhatyāvokṣati yatrainamupāvaharati taṃ dakṣiṇata udañcamupāvaharati tasyokto bandhuḥ

If he unyokes before (reaching) his dwelling, let the fire remain on the chariot itself; but when he unyokes for (staying at) his dwelling, he stops the chariot (with the pole) to the east; and north of it he raises and sprinkles (a place) where he takes it (the fire) down. He takes it down from south to north: the meaning of this has been explained.