ELOKAI OZ is the holiest and beautiful song I’ve ever heard.Rabbi Elyakim from the time of the Harishonim composed the song and the great Ari-z”al also was known to have sung this tune.This holy song continues to be sung In our time by the great Kabbalist Rabbi Yaakov Hillel Shlita.Every Shabbat I love to sing this song together with my son. We even used it as the “theme song” for his Bar Mitzvah in the holy land.