Atharvaveda 20.94.4

20.94.4

evā́ pátiṃ droṇasā́caṃ sácetasam ūrjá skambháṃ dharúṇa ā́ vr̥ṣāyase |
ójaḥ kr̥ṣva sáṃ gr̥bhāya tvé ápy áso yáthā kenipā́nām inó vr̥dhé ||4||

So like a bull thou rushest to the Lord who loves the trough, the Sage, the prop of vigour, in the vat. Prepare thine energies, collect them in thyself: be for our profit as the Master of the wise.