Valmiki Ramayana Yuddha Kanda Sarga 70 Shloka 7
Original Shlokaत्रिशिरास्तंप्रचिच्छेदशरैराशीविषोपमैः । स वृक्षंकृत्तमालोक्यउत्पपाततदाङ्गदः ।।6.70.7।।
1 source checked for this shloka
त्रिशिराः Trisira, आशीविषोपमैः venomous serpents, शरैः arrows, तम् them, प्रचिच्छेद split, तदा then, कृत्तम् action, वृक्षम् trees, आलोक्य observing, सःअङ्गदः that Angada, उत्पपात flew up.
Trisira split the trees with the arrows which were like venomous serpents. Observing Angada's action he flew up.