Valmiki Ramayana Yuddha Kanda Sarga 76 Shloka 10

ततः then, अङ्गदः Angada, तस्य his, अंसफलके fl at surface, खडगम् sword, निजघान pierced, कपिकुञ्जरः monkey leader, एनम् in that way, यज्ञोपवतवत् diagonally, चिच्छेद cut him.

Then Angada pierced his sword on the fl at surface of his shoulder diagonally and cut him with his sword.