Jaiminīya (Talavakāra) Brāhmaṇa 1.84

He says: 'O Soma, sing forth; sing forth, O Soma!' / Soma is the lord of the field among the gods. / Having announced it to Soma, the lord of the field among the gods, he sings forth; he incurs no misfortune. / [He says:] 'For my fiery energy, for my spiritual luster, for my food-eating, for my abundance, for my flourishing, for my procreation; for the abundance of [my] progeny, for the flourishing of [my] progeny, for the procreation of [my] progeny; for king Soma's kingship; for my chieftainship!' / Grāva Maitreya used to say: 'Why should I sing for one [wish]? Why for one?' / By this [formula] he then said: 'O Soma, sing forth; sing forth, O Soma, this for so-and-so, this for so-and-so.' / These wishes of his were fulfilled. / These nooses of the gods are spread out when the dhiṣṇya hearths are distributed. / He who enters knowing this, puts on the nooses of the gods. / This is the door of the sacrifice: that which is between the Āgnīdhra [shed] and the pit (cātvāla). / Through that he should enter. / Through that he should come out. / 'Dhā' (foundation) indeed is the name of the altar. / Stepping onto it, he should say: 'You are Dhā; place excellent foundation (sudhā) in me! / Long-lived, luminous through you, may we sing forth!' / He does not put on the nooses of the gods; he incurs no misfortune.

They creep to the heavenly world having connected the breaths, when, having taken the soma cups inside the havirdhāna shed,

they creep out to the bahiṣpavamāna [chant].