Iconography
The icon of the Last Supper unites our Lord and his Apostles around a semi-circular table. There are vases for the washing of the feet in front of the table and above it hangs a lamp. The Lord presides at the table without being in the centre. Peter, head of the Apostles, is sitting in front of him. The Iscariot holds a bag of silver and the Beloved One lays his head on our Lord's chest, This composition is totally different from the ones we are accustomed to seeing in the depictions of the Last Supper of the Renaissance and Post-Renaissance periods. Whereas, it is common in Oriental iconographies.
Bible
"When the hour came, he took his place at the table, and the apostles with him. He said to them, 'I have eagerly desired to eat this Passover with you before I suffer'..Then he took a loaf of bread, and when he had given thanks, he broke it and gave it to them, saying, This is my body, which is given for you. Do this in remembrance of me.' And he did the same with the cup after supper, saying, 'This cup that is poured out for you is the new covenant in my blood. But see, the one who betrays me is with me, and his hand is on the table". (Lk 22: 14-15, 19-21)
Liturgy
"Our Lord is the High-Priest and Eternal Sacrifice, he sacrificed himself to his Father. He is the dying One and through his death he became alive, an unconceivable Mystery. He is the priest and the holocaust, the unfathomable quest. Our Lord broke his Body in his hands for his twelve Apostles. He taught them how to break his Body for the Church and how to give it to the children of the Mystery of faith. He taught them how to drink the chalice of his Blood and how to give it to drink to the people and the nations". (Boouto, Holy Thursday, Beit Gazo, B.L. 14,701)




