The Catechism in Questions & Answers

165. How did the arrest of Jesus occur?

While Jesus was asking the Apostles to watch with Him, a large group of armed soldiers sent by the chief priests arrived. Judas Iscariot led them to Jesus and betrayed Him with a kiss: “Whomever I kiss, He is the One; seize Him” (Matthew 26: 48).

“Then He came to the disciples and found them sleeping, and said to Peter, ‘What? Could you not watch with Me one hour? Watch and pray, lest you enter into temptation. The spirit indeed is willing, but the flesh is weak.” Matthew 26: 40-41