avikṣatāṁs tatrasur indra-sainikān

tan-them (the soldiers of the demigods); aksatan-not injured; svasti-matah-being very healthy; nisamya-seeing; sastra-astra-pugaih-by the bunches of weapons and mantras; atha-thereupon; vrtra-nathah-the soldiers led by Vrtrasura; drumaih-by the trees; drsadbhih-by the stones; vividha-various; adri-of mountains; srṅgaih-by the peaks; aviksatan-not injured; tatrasuh-became afraid; indra-sainikan-the soldiers of King Indra.