Paraskaragrihyasutra 2.1.23

2.1.23

anuguptametaṃ sakeśaṃ gomayapiṇḍaṃ nidhāya goṣṭhe palvala udakānte vā ' 'cāryāya varaṃ dadāti \22\

Having put away that lump of dung with the hair so that it is hidden in a cow-stable, or in a small pond, or in the vicinity of water; he gives an optional gift to the teacher;