Valmiki Ramayana Yuddha Kanda Sarga 67 Shloka 64

तदा then, हृष्टः rejoiced, प्लवङ्गमः monkey, भारसहस्रस्य thousand bharas, कृतम् done, महत् great, कालायसम् iron, शूलम् pike, जानुम् knee, आरोप्य resting, बभञ्ज broke it.

Then a rejoiced monkey, resting the thousand bharas iron pike on his knee broke it.