Skandapurana 16.257.8

16.257.8

indrādīṃśca surānsarvānāvāhya vidhipūrvakam ..
dakṣiṇārthaṃ dvijendrāṇāṃ prabhāsaṃ sa jagāma ha ..
gṛhītvā bhrātarau jyeṣṭhau gavārthaṃ prasthito dvijaḥ .. 8 ..

and having invoked all the gods, Indra and the others, according to the rule?' / For the sacrificial fees of the foremost brahmins, he went to Prabhāsa; / taking his two elder brothers, the twice-born set forth to obtain cows.