Samvartta Smriti 20

20

snātvā pītvā tathā bhuktvā spṛṣṭvā caiva dvijottamāḥ
anena vidhinā vipra ācāntaḥ śucitāmiyāt

Having bathed, having drunk, likewise having eaten, and having touched [an impure object], O best of the twice-born, / having sipped water according to this rule, a Brahmin attains purity.