Hallelujah is an interjection from the Hebrew language, used as an expression of gratitude to God. The term is used 24 times in the Hebrew Bible, twice in deuterocanonical books, and four times in the Christian Book of Revelation.
13th century French manuscript; the words "Hallelu-Yah" at the end of Psalm 148 and at the start of Psalm 149 appear above and below the man's left-pointing hand.
Two times "Hallelu-Yah" (הַלְלוּ יָהּ), cropped from the manuscript page above. French 13th century.
Alleluia is a phrase in Christianity used to give praise to God. In Christian worship, Alleluia is used as a liturgical chant in which that word is combined with verses of scripture, usually from the Psalms. This chant is commonly used before the proclamation of the Gospel. In Western Christianity, congregations commonly cease using the word Alleluia during the period of Lent but restore it into their services at Easter. The form of praise "Alleluia" is used by Christians to thank and glorify God; it finds itself present in many prayers and hymns, especially those related to Eastertide, such as "Christ the Lord is Risen Today".
Psalm 91 ᾿Αγαθὸν τὸ ἐξομολογεῖσθαι τῷ κυρίῳ καὶ ψάλλειν τῷ ὀνόματί σου with the alleluiaria in echos plagios tetartos (allelouia refrains written in red ink before the echos plagios section) in a kontakarion about 1300 (F-Pn fonds grec, Ms. 397, f.43r)