Those very Sâman verses (as bees) brooded over the Sâma-veda sacrifice; and from it, thus brooded on, sprang as its (nectar) essence, fame, glory of countenance, vigour, strength, and health.

In plain words: The Sama Veda songs worked over the ritual like bees over a flower. From it came fame, a glowing face, energy, strength and good health.