Mbh 3.39.1a

Vaisampayana said, “After all those illustrious ascetics had gone away, that wielder of the Pinaka and cleanser of all sins--the illustrious Hara--assuming the form of a Kirata resplendent as a golden tree, and with a huge and stalwart form like a second Meru, and taking up a hand some bow and a number of arrows resembling snakes of virulent poison, and looking like an embodiment of fire, came quickly down on the breast of Himavat. And the handsome god of gods was accompanied by Uma in the guise of a Kirata woman, and also by a swarm of merry spirits of various forms and attire, and by thousands of women in the form and attire of Kiratas. And, O king, that region suddenly blazed up in beauty, in consequence of the arrival of the god of gods in such company. And soon enough a solemn stillness pervaded the place. The sounds of springs, and water-courses, and of birds suddenly ceased. And as the god of gods approached Pritha’s son of blameless deeds, he beheld a wonderful sight, even that of a Danava named Muka, seeking, in the form of a boar, to slay Arjuna. Phalguna, at the sight of the enemy seeking to slay him, took up the Gandiva and a number of arrows resembling snakes of virulent poison. And stringing his bow and filling the air with its twang, he addressed the boar and said, ‘I have come here but done thee no injury. As thou seekest to slay me, I shall certainly send thee to the abode of Yama.’ And beholding that firm wielder of the bow--Phalguna--about to slay the boar, Sankara in the guise of a Kirata suddenly bade him stop saying, ‘The boar like the mountain of Indrakila in hue hath been aimed at by me first’; Phalguna, however, disregarding these words, struck the boar. The Kirata also blazing splendour, let fly an arrow like flaming fire and resembling the thunderbolt at the same object. And the arrows thus shot by both fell at the same instant of time upon the wide body of Muka, hard as adamant.