Valmiki Ramayana Yuddha Kanda Sarga 70 Shloka 56

पुरस्तात् again, स्थितम् standing, पर्वतोपमम् like a mountain, वानरम् Vanara, दृष्टवा seeing, क्रुद्धः angry, वज्रकल्पया close to thunderbolt, गदया with mace, उरसि on the chest, आजघान hit.

Again, seeing Rshaba standing in front like a mountain, enraged Mahaparsva hit him on the chest with the mace that was like a thunderbolt.