The death of their firstborn was the final judgement that persuaded Pharaoh to let the Israelites leave Egypt. God instructed the Israelites to paint the blood of a lamb on their doorposts. He said that when He saw the blood, He would pass over that household and not strike their first-born. Passover gets its name from this ‘passing over’ the homes of the people of God. It is a graphic foreshadowing of how Jesus, the Lamb of God, would shed His blood for the salvation of all who believe.
Every year thereafter, through to the time of Jesus, the people of God celebrated Passover with a special meal. On the Thursday evening that started what we now call Good Friday (the Jewish day starts at six pm the previous evening), Jesus met with His disciples to celebrate Passover with them.
From the details given in the Gospels, it seems they reclined at a low table arranged in a typical Roman format; a sort of square U shape with two short sides and a longer middle section. According to the custom of the day, the one responsible for the meal would sit at the extreme end of one of the short lengths, next to him would be the host, and next to him the guest of honour. The other guests would then sit in order of importance, with the least important sitting at the end of the other short length, directly opposite the organizer. For the Last Supper, the organiser would have been John, the host Jesus, and the guest of honour Judas. Yes Judas! It was protocol for the host to have the guest of honour seated on his left, and to demonstrate favour by serving him with a piece of bread dipped in the stew. Jesus announced to his startled disciples that one of them was about to betray him. John 13:21-26 records how Peter signalled to John to catch his attention and then asked him to inquire of Jesus who His betrayer was. John leaned back against Jesus and asked him. Jesus replied, “It is the one to whom I will give this piece of bread when I have dipped it in the dish.” Then, dipping the piece of bread , he gave it to Judas Iscariot, son of Simon.’
Jesus went from the Upper Room to the Cross. In the Upper Room He washed His disciples’ feet with water, but at Golgotha He washed their souls with His blood. And not just them but all of us who accept His sacrifice. In the Upper Room, Jesus gave up His dignity to serve, and at Golgotha He gave up His life to save.