Valmiki Ramayana Yuddha Kanda Sarga 77 Shloka 19
Original Shlokaतदाह्रियमाणोऽपिकुम्भकर्णात्मजेन ह ।।6.77.19।। आजघानानिलसुतोवज्रकल्पेनमुष्टिना ।
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तेन by that, तदा then, ह्रियमाणःअपि being carried also, अनिलसुतः son of windgod, कुम्भकर्णात्मजेन son of Kumbhakarna, वज्रकल्पेन with his hard adamant, मुष्टिना fist, आजघान hit him.
Even while being carried by Rakshasa also, the son of the wind god hit Kumbhakarna's son with his hard adamant fist.