John 6:15-21

Then Jesus, knowing that they were going to come and take Him by force to make Him king, withdrew again to the mountainside by Himself. When evening came, His disciples went down to the sea, and they got into a boat and started to cross the sea to Capernaum. It was already dark, and Jesus had still not come [back] to them. The sea was getting rough and rising high because a strong wind was blowing. Then, when they had rowed three or four miles [and were near the center of the sea], they saw Jesus walking on the sea and approaching the boat; and they were [terribly] frightened. But Jesus said to them, “It is I (I AM); do not be afraid.” [Matt 14:27; John 8:58] Then they were willing to take Him on board the boat, and immediately the boat reached the [shore of the] land to which they were going.