Valmiki Ramayana Kishkindha Kanda Sarga 17 Shloka 2
Original Shlokaस भूमौ न्यस्तसर्वाङ्गस्तप्तकाञ्चनभूषणः। अपतद्देवराजस्य मुक्तरश्मिरिव ध्वजः4.17.2।।
1 source checked for this shloka
तप्तकाञ्चनभूषणः adorned with shining gold ornaments, सः he, मुक्तरश्मिः with the loosening of ropes, देवराजस्य Indra's, ध्वजः इव like the post, भूमौ on the ground, न्यस्तसर्वाङ्गः all limbs of body touching the ground, पपात fell down
Adorned with shining gold ornaments,Vali fell down with all his limbs touching the ground like Indra's flag when its ropes are loosened.