Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 8.1.19

8.1.19

ā jātam jāta vedasi ity āvatīm āhūyamānāya / (soma: agni manthana)

when being summoned (the verse ) containing (the word) 'hither', 'Hither born in the All-knower'; for him when being lighted, 'Agni is lighted by Agni' and 'For thou, O Agni, by Agni', two (verses ) containing the word 'lighted'. 'They cleanse him with keen insight', he says in conclusion, with (a verse ) ending 'The strong steed in his own abodes'; the abode is the end; the concluding verse is the end; in the end he places the end. (He recites) the first thrice, the last thrice; they make up sixteen; (all this universe) has sixteen parts; verily (it serves) to obtain all this (universe).