Jaiminīya (Talavakāra) Brāhmaṇa 38.224

Now the Kākṣīvata [sāman]. / Kakṣīvant desired, 'May I be propagated abundantly with offspring and cattle, may I attain prosperity and kingship.' / He saw this sāman. / With it he praised. / Thereupon, indeed, he was propagated abundantly with offspring and cattle; he attained prosperity and kingship. / There were, indeed, a thousand descendants of Kakṣīvant. / With these sons, indeed, he attained prosperity and kingship. / He who knows thus reaches prosperity, attains kingship. / And it is unstruck by stobhas. / From the unstruck, indeed, offspring and cattle are born. / The Chandomas are cattle. / Therefore it is rich in form. / And because Kakṣīvant saw it, therefore it is called the Kākṣīvata.

Now the Pramaṃhiṣṭhīya [sāman].

When the seers were seated at a sacrificial session, their cattle ran low.

They desired, 'May we obtain cattle.'

They said, 'Come, let us ask Agni for cattle.'

'He rules over cattle.'

'He alone will give us cattle.'