Entertainment / Literature / Hallel: (Hebrew, 'celebrate,' possibly adopted as a loanword from Eblaite) A hymn of praise, specifically in Psalms 113-18, each of which is headed with the plural imperative verb, Hallelujah. The hallel was to be sung at the four main Jewish festivals: Passover, Pentecost, Dedication, and Tabernacles.
Search Google for Hallel: