|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.
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
Easton, Matthew George. "Entry for 'Hallelujah'". "Easton's Bible Dictionary".