Mark 6:31-34, 45-50

And he said unto them, Come ye yourselves apart into a desert place, and rest a while: for there were many coming and going, and they had no leisure so much as to eat. And they departed into a desert place by ship privately. And the people saw them departing, and many knew him, and ran afoot thither out of all cities, and outwent them, and came together unto him. And Jesus, when he came out, saw much people, and was moved with compassion toward them, because they were as sheep not having a shepherd: and he began to teach them many things.

And straightway he constrained his disciples to get into the ship, and to go to the other side before unto Bethsaida, while he sent away the people. And when he had sent them away, he departed into a mountain to pray. And when even was come, the ship was in the midst of the sea, and he alone on the land. And he saw them toiling in rowing; for the wind was contrary unto them: and about the fourth watch of the night he cometh unto them, walking upon the sea, and would have passed by them. But when they saw him walking upon the sea, they supposed it had been a spirit, and cried out: for they all saw him, and were troubled. And immediately he talked with them, and saith unto them, Be of good cheer: it is I; be not afraid.