During the fourth watch of the night, he came toward them, walking on the sea. When the disciples saw him walking on the sea they were terrified. "It is a ghost," they said, and they cried out in fear. At once (Jesus) spoke to them, "Take courage, it is I; do not be afraid." Peter said to him in reply, "Lord, if it is you, command me to come to you on the water." He said, "Come." Peter got out of the boat and began to walk on the water toward Jesus.