Agnipurana 353.6

353.6

naivepsitaṃ nānīpsitaṃ dugdhaṃ sambhakṣyanrajaḥ /
bhakṣyedpyakathitaṃ gopālo dogdhi gāṃ payaḥ //

neither desired nor undesired: 'Eating milk, he eats dust'; / [the object] not specially stated: 'The cowherd milks milk from the cow';