Matsyapurana 105.18

105.18

sā gaustasmai pradātavyā gaṅgāyamunasaṃgame
vāsāṃsi ca mahārhāṇi ratnāni vividhāni ca //

One who gives away a pale-red milch cow, after getting her horns plaited with gold, her hoofs with silver, along with a milking pot of bell metal, cloth and jewels, to a virtuous and dispassionate Brâhmaṇa, well-versed in the Vedas, at the confluence of the Ganges and the Yamunâ, goes to and resides in the heaven for as many years as there are hairs on the body of that cow.—16-19.