Hallelujah: Praise ye Jehovah, frequently rendered "Praise ye the LORD," stands at
the beginning of ten of the psalms (106, 111-113, 135, 146-150) hence
called "hallelujah psalms." From its frequent occurrence it grew into
a formula of praise. The Greek form of the word (alleluia) is found in
(Revelation 19:1,3,4,6)