The Compendium of Bheḷa 6.6.29

6.6.29

anyonyairmaṇḍalairviddhaṃśvitraṃ tadupapādayet | mīnamūṣikakīṭānāṃ viṣavegena dūṣitam ||

and pierced by reciprocal circular patches, one should identify as śvitra. / That which is vitiated by the vehemence of poison from fish, mice, or insects,