YV 5.2l

In that he repeats this Trca, he makes the sacrifice have Samans. Agni was in yonder world, the sun in this; these worlds were disturbed [1]. The gods said, 'Let us change them about.' (Saying), 'O Agni, come hither for the feast', they placed Agni in this world, and (saying),'The great and powerful one, O Agni', they placed the sun in yonder world. Then indeed these worlds became calm. In that he repeats (it) thus, (it serves) for the calming of these worlds; these worlds become calm for him who knows thus. He repeats fifteen Samidhenis [2]. The nights of the half-month are fifteen; the year is made up of half-months. There are three hundred and sixty syllables in the Samidhenis; there are as many nights in the year; verily by syllables he obtains the year. Nrmedha and Paruchepa had a theological dispute (and said), 'Let us generate fire in the dry wood (to see) which of us two is the more of a theologian.' Nrmedha spoke; he generated smoke. Paruchepa spoke; he generated fire. 'O Rsi', he said, [3], 'seeing that our knowledge is equal, how didst thou generate fire and not I?' 'I know the character of the Samidhenis', he replied. The character of the Samidhenis is the quarter-verse which is repeated with the word 'ghee' in it. 'Thee with the kindling-sticks, Angiras', he says; verily he generates light in the Samidhenis. They are feminine in that they are Rc (verses), they are feminine in that they are Gayatri (verses), they are feminine in that they are Samidhenis. He repeats a verse with the word 'Male' in it [4]. By it he gives them a husband, makes them possess Indra, and mates them. Agni was the messenger of the gods, Uçanas Kavya of the Asuras. They went to question Prajapati; he turned away (from Uçanas) (with the words). 'Agni as messenger we choose.' Then the gods prospered, the Asuras were defeated. The man for whom, knowing thus, he repeats, 'Agni as messenger we choose, prospers himself, his enemy is defeated.