Shatapatha Brahmana 9.4.4.14

9.4.4.14

dvābhyāṃ vimuñcati | dvipādyajamāno yajamāno 'gniryāvānagniryāvatyasya mātrā tāvataivainametadvimuñcati tribhiryunakti tatpañca pañcacitiko 'gniḥ pañca 'rtavaḥ saṃvatsaraḥ saṃvatsaro 'gniryāvānagniryāvatyasya mātrā tāvattadbhavati

With two (verses) he unyokes it,--two-footed is the Sacrificer, and Agni is the Sacrificer: as great as Agni is, as great as is his measure, with so much he thus unyokes him. With three (verses) he yokes,--that (makes) five,--the fire-altar consists of five layers, the year (of) five seasons, and Agni is the year: as great as Agni is, as great as is his measure, so great is this.