Manava Dharmashastra 11.134

11.134

ghṛtakumbhaṃ varāhe tu tiladroṇaṃ tu tittirau
śuke dvihāyanaṃ vatsaṃ krauñcaṃ hatvā trihāyanam //

For killing a snake, a Brahmana shall give a spade of black iron, for a eunuch a load of straw and a masha of lead;