AVŚ 5.8.9
अत्रैनान् इन्द्र वृत्रहन्न् उग्रो मर्मणि विध्य । अत्रैवैनान् अभि तिष्ठेन्द्र मेद्य् अहं तव । अनु त्वेन्द्रा रभामहे स्याम सुमतौ तव ॥९॥
atrainān indra vṛtrahann ugro marmaṇi vidhya | atraivainān abhi tiṣṭhendra medy ahaṃ tava | anu tvendrā rabhāmahe syāma sumatau tava ||9||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Here, O Indra, Vṛtra-slayer, do thou, formidable, pierce them in the vitals; just here do thou trample upon them; O Indra, thine ally am I; we take hold on thee, O Indra; may we be in thy favor.
Translated by William Dwight Whitney (1905)