Immediately Jesus made the disciples get into the boat and go on ahead of him to the other side, while he dismissed the crowd. ²³ After he had dismissed them, he went up on a mountainside by himself to pray.  Later that night, he was there alone, ²⁴ and the boat was already a considerable distance from land, buffeted by the waves because the wind was against it.
²⁵ Shortly before dawn Jesus went out to them, walking on the lake. ²⁶ When the disciples saw him walking on the lake, they were terrified.  “It’s a ghost,” they said, and cried out in fear.
²⁷ But Jesus immediately said to them: “Take courage!  It is I.  Don’t be afraid.”
(Matthew 14:22-27 -- NIV)