The Maori lyrics to Hareruia were penned Rev Te Hira Paenga, who is of Ngati Porou and Ngapuhi descent.
Hallelujah was originally released by Canadian singer/songwriter Leonard Cohen in 1984. It went virtually unnoticed until it was covered by John Cale, whose version was used in the movie Shrek, and later by Jeff Buckley.
Ref. https://www.nzherald.co.nz/northern-advocate/news/kaikohe-kids-go-viral-with-te-reo-hallelujah/QOCBJA7WZNSSCDVTA36D22KGAA/
In The Shift. https://open.spotify.com/show/1ZV9UASRjboARUQSF9qgWf
In A Manner Of Speaking. https://open.spotify.com/show/2pa7Yb6FPWeQxhJAfptCzr