śakṛn-mūtraṁ vimuñcati

yama-dutau-two messengers of Yamaraja; tada-at that time; praptau-arrived; bhimau-terrible; sa-rabhasa-full of wrath; iksanau-their eyes; sah-he; drstva-seeing; trasta-frightened; hrdayah-his heart; sakrt-stool; mutram-urine; vimuncati-he passes.