Valmiki Ramayana Yuddha Kanda Sarga 54 Shloka 18

ततः then, महाबलः endowed with great strength, हरिपुत्रम् monkey 's son, शतसहस्रेण hundred thousand, मातङ्गमिवतोमरैः like an elephants is pierced with clubs, मर्मदेशेषु private parts, जघान pierced.

Then Angada endowed with great strength, pierced Vajradamshtra in his private parts with clubs used for piercing elephants.