“In the traditional church calendar, today is Maundy Thursday, the day of Holy Week that commemorates Jesus’ institution of the Lord’s Supper on the night that he was betrayed” writes Luke Stamps at the Credo blog….
“The name “Maundy Thursday” is taken from the phrase mandatum novum (“a new commandment”) from the Latin version of John 13:34: “A new commandment I give to you, that you love one another: just as I have loved you, you also are to love one another.” Today, Christians around the world will remember the events of that last night of Jesus’ life: his Last Supper, his final instructions to the disciples, his washing of the disciples’ feet, his betrayal and arrest. But one of the most gripping scenes of Maundy Thursday is Jesus’ agony in the Garden of Gethsemane. It was there—in a secluded garden on the Mount of Olives—that the Son of God prepared himself for the epoch-shattering events of the next day, which would culminate in his wrath-bearing death on the cross.”
To read of these events, and the rest of the passion of Jesus Christ, you can turn to any of the four Gospels: the Gospel of John, beginning with chapter 13, the Gospel of Luke (ch 22), the Gospel of Matthew (ch 26), or the Gospel of Mark (ch 14).