Matthew 14:23-28

And after he had sent the multitudes away, he went up into the mountain apart to pray: and when even was come, he was there alone. But the boat was now in the midst of the sea, distressed by the waves; for the wind was contrary. And in the fourth watch of the night he came unto them, walking upon the sea. And when the disciples saw him walking on the sea, they were troubled, saying, It is a ghost; and they cried out for fear. But straightway Jesus spake unto them, saying, Be of good cheer; it is I; be not afraid. And Peter answered him and said, Lord, if it be thou, bid me come unto thee upon the waters.