Jaiminīya (Talavakāra) Brāhmaṇa 16.71

On this point they say: 'Proper food is indeed carried away from him from whom the fire is carried away.' / He should address it with the sacred formulas: / 'Return with strength, return, O Agni, with food and life! / Protect us again from distress! / Return with wealth, O Agni; overflow with a stream / all-nourishing, from all around!' / Thus he puts proper food back into himself. / With that with which he sings the prelude, they approach the cadence. / Therefore that sun yonder moves back and forth. / From where it rose today, from there it will rise tomorrow. / Now the Vāmadevya [sāman]. / Cattle are the Vāmadevya. / Having praised with this, they become possessed of cattle. / 'All the battle-lines, overcoming them, the men joined together fashioned Indra, and they generated the sovereign,' / thus they are verses containing 'born'. / Containing [the word] 'birth' is the form of this vairāja day.

Upon them is the Traiśoka [sāman].

The Vairāja sacrifice indeed crushes down, as it were.

They prop it up with the Traiśoka, as if with a larger meter.

These worlds, being together, split into three.

They grieved, just as a single [body] cut into three would grieve.

The gods said: 'Let us strike away the three sorrows of these three worlds.'

They saw this sāman.

They praised with it.

With it they struck away the three sorrows of these three worlds.

Because they struck away the three sorrows of these three worlds, that is the Traiśoka-nature of the Traiśoka.

He strikes away sorrow who knows this.