Valmiki Ramayana Sundara Kanda Sarga 42 Shloka 30
Original Shlokaहनुमानपि तेजस्वी श्रीमान्पर्वतसन्निभः। क्षितावाविध्य लाङ्गूलं ननाद च महास्वनम्।।5.42.30।।
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तेजस्वी brilliant, श्रीमान् illustrious one, पर्वतसन्निभः resembling a mountain, हनुमानपि Hanuman also, लाङ्गूलम् tail, क्षितौ on the ground, आविध्य waved, महास्वनम् causing loud sound, ननाद च roared.
Gigantic Hanuman, illustrious and brilliant, roared and waved his tail striking it with force on the ground causing loud sound.