Garudapurana 1.197.52

1.197.52

trinetramugrarūpañca viṣanāgakṣayaṅkaram /
grasanaṃ bhīmavaktraṃ ca garuḍaṃ mantravigraham //

three-eyed, of fierce form, the destroyer of poisonous serpents, / devouring, of terrifying face, Garuḍa the embodiment of mantra;