YV 6.5e

(The brick) which he put down in front became the head, that is the eastern quarter; (the brick) which he put down on the right became the right side, that is the southern quarter; (the brick) which he put down behind became the tail, that is the western quarter; (the brick) which he put down on the left [3] became the left side, that is the northern quarter; (the brick) which he put down above became the back, that is the zenith. Agni of the five bricks is this (earth); therefore when they dig in it they knock up against the brick, against gravel. Now all this (earth) in the eyes of the birds shines at night, therefore birds do not at night rest upon it. He who knowing this piles a fire finds support, and conquers all the quarters. The Brahman is connected with Agni, therefore the Brahman finds prosperity in all the quarters; verily every quarter he goes to is his own. The fire is the nest of the waters; therefore waters draw the fire; verily they enter their own birthplace. Having kept the fire in the pan for a year in the second year he should offer on eight potsherds to Agni, to Indra on eleven potsherds, to the All-gods on twelve potsherds, to Brhaspati an oblation, to Visnu on three potsherds; in the third year he should sacrifice with the Abhijit (offering). In that there is (an offering) on eight potsherds, the Gayatri has eight syllables, and the morning pressing is connected with Agni and the Gayatri, verily he supports by it the morning pressing and the Gayatri metre. In that there is (an offering) on eleven potsherds, the Tristubh has eleven syllables, and the midday pressing is connected with Indra and the Tristubh, verily he supports by it the midday pressing and the Tristubh [1] metre. In that there is (an offering) on twelve potsherds, the Jagati has twelve syllables, and the third pressing is connected with the All-gods and the Jagati, verily he supports by it the third pressing and the Jagati metre.