' The Samaveda '...

The Samaveda,, or Veda of Holy Songs,, third in the usual order of enumeration of the three Vedas,, ranks next in sanctity and liturgical importance to the Rgveda or Veda of Recited praise... Its Sanhita,, or metrical portion,, consists chiefly, of hymns to be chanted by the Udgatar priests, at the performance of those important sacrifices, in which the juice of the Soma plant,, clarified, and mixed with milk and other ingredients,, was offered in libation to various deities........... from Hinduwebsite.com