Agniveshyagrihyasutra 3.8.2.10

3.8.2.10

athānaḍuho vimuñcati vimucyadhvamaghniyā devayānā atāriṣma tamasaspāramasya \

Then he unyokes the oxen: "Be unyoked, O invulnerable ones, traveling the path of the gods; we have crossed to the further shore of this darkness;