Valmiki Ramayana Yuddha Kanda Sarga 45 Shloka 22

येन by whom, पुरा earlier, शक्रः Indra, विनिर्जितः utterly defeated, इन्द्रजिता Indrajith, क्रोधात् in anger, मार्गणैः arrows, मर्मसु vital parts, विद्धः, रामः Rama, प्रधमम् first, पपात fell.

Rama fell first pierced by arrows in his vital parts released in anger by Indrajith, by whom Indra was utterly defeated.