The hymn of praise sung by Jesus and the eleven disciples after the Lord's Supper (Mark 14: 26), as was customary at the end of a Passover meal. It was part of Psalms 115–18, which were praises inspired by the story of the Exodus.
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"hallel." In A Dictionary of the Bible. Ed. W. R. F. Browning. Oxford Biblical Studies Online. Sep 21, 2014. <http://www.oxfordbiblicalcstudies.com/article/opr/t94/e815>.
"hallel." In A Dictionary of the Bible. , edited by W. R. F. Browning. Oxford Biblical Studies Online, http://www.oxfordbiblicalcstudies.com/article/opr/t94/e815 (accessed Sep 21, 2014).