GB, 2, 4, 16, 1.0 atha yad aindrābārhaspatyaṃ brāhmaṇācchaṃsina ukthaṃ bhavatīndraś ca somaṃ pibataṃ bṛhaspate 'smin yajñe mandasānā vṛṣaṇvasū ity ṛcābhyanūktam //

ṚV, 4, 50, 10.1 indraś ca somam pibatam bṛhaspate 'smin yajñe mandasānā vṛṣaṇvasū /

ṚV, 5, 74, 1.2 tacchravatho vṛṣaṇvasū atrir vām ā vivāsati //