Atharvaveda 7.97.1

7.97.1

yád adyá tvā prayatí yajñé asmín hótaś cikitvann ávr̥ṇīmahīhá |
dhruvám ayo dhruvám utā́ śaviṣṭhaipravidvā́n yajñám úpa yāhi sómam ||1||

Since today, as this sacrifice goes forward, we chose thee here, O knowing hótar, mayest thou go fixedly, and, O mightiest one, do thou, foreknowing, go unto the fixed sacrifice, the soma.