Gobhilagrihyasutra 2.4.6

2.4.6

gṛhagatāṃ patiputraśīlasampannā brāhmaṇyo 'varopyā ''naḍuhe carmaṇy upaveśayantī 'ha gāvaḥ prajāyadhvam iti;

When (the bride) has reached the house, Brâhmana women of good character, whose husbands and sons are living, make her descend (from the chariot), and make her sit down on a bull's hide with (the verse which the husband recites), 'Here, ye cows, bring forth calves' (MB. I, 3, 13).