Atharvaveda 10.6.6

10.6.6

yám ábadhnād bŕ̥haspátir maṇíṃ phā́laṃ ghr̥taścútam ugráṃ kadhirám ójase |
tám agníḥ práty amuñcata só asmai duha ā́jyaṃ bhū́yobhūyaḥ śváḥśvas téna tváṃ dviṣató jahi ||6||

What amulet, plow-share, ghee-dripping, the formidable khadirá, Brihaspati bound on, in order to force—that Agni fastened on; it yields (duh) to him sacrificial butter, more and more, morrow after morrow; with that do thou slay thy haters.