The Compendium of Bheḷa 2.3.8

2.3.8

punaś ca dṛśyate vyaktaṃ punarnaśyati cāpy atha | karoti gāḍhaṃ duḥkhena purīṣaṃ vāsaśoṇitam ||

and at one moment it is distinctly visible, and then it disappears again; / he passes hard stool with difficulty, or accompanied by blood;