Valmiki Ramayana Yuddha Kanda Sarga 99 Shloka 20
Original Shlokaसवीरोवज्रसङ्काशमङ्गदोमुष्टिमात्मनः ।।6.99.20।। संवर्तयत्सुसङ्कृद्धःपितृतुल्यपराक्रमः ।
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पितृतुल्यपराक्रमःequal to father in prowess, वीरःheroic, सःअङ्गदःAngada, सुसङ्कृद्धः highly furious, आत्मनः himself, वज्रसङ्काशम् resembling thunderbolt, मुष्टिम् fist, सम्वर्तयामास clenched
Angada, who was equal to his father in his prowess, was highly furious and himself clenched his fist which resembled thunderbolt.