Immediately, Jesus said, “Calm down!  It’s me.  Don’t be afraid!”
²⁸ Peter answered, “Lord, if it is you, order me to come to you on the water.”
²⁹ Jesus said, “Come!” So Peter got out of the boat and walked on the water toward Jesus. ³⁰ But when he noticed how strong the wind was, he became afraid and started to sink.  He shouted, “Lord, save me!”
³¹ Immediately, Jesus reached out, caught hold of him, and said, “You have so little faith!  Why did you doubt?”
³² When they got into the boat, the wind stopped blowing. ³³ The men in the boat bowed down in front of Jesus and said, “You are truly the Son of God.”

(Matthew 14:27-33 -- GW)