Atharva Veda 7.70

Whatsoever he yonder offers with mind, and what with voice, with sacrifices, with oblation, with sacred formula (yájus), that let perdition, in concord with death, smite, his offering, before it comes true.

The sorcerers, perdition, also the demon—let them smite his truth with untruth; let the gods, sent by Indra, disturb (math) his sacrificial butter; let not that meet with success which he yonder offers.

Let the two speedy over-kings, like two falcons flying together, smite the sacrificial butter of the foeman, whosoever shows malice against us.

Turned away [are] both thine arms; I fasten up thy mouth; with the fury of divine Agni—therewith have I smitten thine oblation.

I fasten back thine arms; I fasten up thy mouth; with the fury of terrible Agni—therewith have I smitten thine oblation.