Rigvidhana 2.3.14

2.3.14

anasā samprayātas tu sthirau gāvāv iti smaret./
catasraḥ kuśalena eti siddha arthaḥ sthirayā anugaḥ.//

When setting out on a cart, he should remember [the hymn], "Sthirau gāvau" ("Firm be the pair of oxen"). / With the four [verses], accompanied by a steady [vehicle], he reaches safety, his goal attained.