Varahashrautasutra 2.2.3.25

2.2.3.25

vyavokṣaṇāntaṃ kṛtvottame pravargyānuvākyena gaṇena paścārdhe caturthamīdṛṅ ceti pañcamīmīdṛkṣāsa iti ṣaṣṭhīmindraṃ daivīrviśa iti saptamīm

Having concluded up to the sprinkling, in the highest [layer], with the Pravargya-announcing group [of verses], in the western half, [he places] the fourth [brick] with 'Like this...', the fifth with 'Of such appearance...', the sixth with 'Indra, the divine clans...', [and] the seventh.