St Matthew 14:28-31

And Peter making answer, said: Lord, if it be thou, bid me come to thee upon the waters. And he said: Come. And Peter going down out of the boat, walked upon the water to come to Jesus. But seeing the wind strong, he was afraid: and when he began to sink, he cried out, saying: Lord, save me. And immediately Jesus stretching forth his hand took hold of him, and said to him: O thou of little faith, why didst thou doubt?