YV 1.5e

As the beginning of the sacrifice is performed the Raksases are fain to destroy the sacrifice; now then is this (place) the beginning of the sacrifice when the libation comes upon it; he draws a line around, to smite away the Raksases; with three (verses) he draws a line around, Agni is threefold; verily from the whole extent of Agni he smites away the Raksases [4]; with a Gayatri verse he draws a line around, the Gayatri is brilliance; verily with brilliance, he encircles him; with a Tristubh verse he draws a line around, the Tristubh is power; verily he encircles him with power; with an Anustubh verse he draws a line around, the Anustubh, envelops all the metres, (verily it serves) for complete attainment; with the Anustubh in the middle (he draws), the Anustubh is speech, therefore from the middle we speak with speech; with the Gayatri first he draws, then with the Anustubh, then with the Tristubh; the Gayatri is brilliance, the Anustubh the sacrifice, the Tristubh power; verily he encircles the sacrifice, with brilliance and power, on both sides. 'On the instigation of the god Savitr thee', (with these words) he digs, for instigation. Then with it he produces smoke; 'Full of light, thee, O Agni, of fair aspect', he says, and thereby he produces light. Agni on birth afflicted creatures with pain, him the gods appeased by the half-verse; 'auspicious and harmless to offspring', he says; verily he makes him appeased for offspring. He digs with two (verses), for support. 'Thou art the back of the waters', (with these words) he takes the lotus leaf [1]; the lotus leaf is the back of the waters; verily with its own form he takes it. He gathers with a lotus leaf; the lotus leaf is the birthplace of Agni; verily he gathers Agni with his own birthplace. He gathers with a black antelope skin; the black antelope skin is the sacrifice; verily he gathers the sacrifice with the sacrifice.