Shatapatha Brahmana 4.6.8.21

4.6.8.21

athātra prācīnavaṃśā śālā bhavati | taddevatrā samāna āhavanīyo bhavati samāno gārhapatyaḥ samāna āgnīdhrīyastadetatsattraṃ samṛddhaṃ yathaikāhaḥ samṛddha evaṃ tasya na hvalāsti tasyaiṣaiva samānyāvṛdyadanyaddhiṣṇyebhyaḥ

If they cannot get brown Dûb plants, he may also press any kind of yellow Kusa plants. In that case let him also give one cow; and, when he comes out of the purificatory bath, let him again become consecrated, for the atonement for that (use of plants other than Soma) is a second sacrifice. So much then as to those robbed of their Soma.