Grotto of the Betrayal

Just beside the tomb of the Virgin Mary is the Grotto of the Betrayal, where Jesus was betrayed by a kiss from his disciple Judas and then arrested.
I really liked a simple carving in the wall of the grotto just to the right of the altar that reads, in Latin, the command that Jesus gave his disciples in the Garden of Gethsemane, "Stay here and keep watch with me." (Matthew 26:38)