Jaiminīya (Talavakāra) Brāhmaṇa 47.265

Now [the sāman] with the nidhana "idāvasu", with a nidhana outside, is connected with the Bṛhat.
Therefore it is performed on the Bṛhat-day.
There was indeed a ṛṣi named Asur, who was without cattle.
He desired: "May I obtain cattle."
He saw this sāman.
He praised with it.
He approached this very nidhana: "This is wealth" (idaṃ vasu).
That is why [the sāman] with the nidhana "idāvasu" is called Idāvasunidhana.
Wealth is indeed cattle.
Then indeed he obtained cattle.
That is a sāman that brings cattle.
He obtains cattle, he becomes rich in cattle who knows thus.
It has a four-syllable nidhana; cattle are four-footed.
The chandomas are cattle; [it is] for the attainment of cattle.

Now the Kāśīta.
Consumption indeed seized Kaśīti Saubhara at a sacrificial session.
He desired: "May I strike away consumption."
He saw this sāman.
He praised with it:
"May the wind blow medicine to our heart, bringing well-being and joy;
may he lengthen our life-spans.
What treasure of immortality is placed yonder in your house, O Wind,
give us from that to live.
And you, O Wind, are our father, and brother, and our friend;
make us live."
Thus the Wind made medicine for him.
They perform this medicine as an expiation.
And it is a granter of desires; for he desired that desire.
That desire was fulfilled for him.
Whatever desire one has when one praises with this sāman, that desire is fulfilled for him.
They conclude with an iḷā turned backward, [thinking:] "May we not slip beyond, going away from the meters."
Iḷā is cattle.
The chandomas are cattle; [it is] for the attainment of cattle.
And because Kaśīti Saubhara saw it, therefore it is called Kāśīta.