Mark 6:48-50

48But he could see his disciples. They were trying to make the boat move along. But it was very difficult for them because the wind was blowing in the opposite direction. Then, when it was nearly dawn, Jesus walked on the water towards his disciples. He seemed to be going on past them.

49But they saw that he was walking on the water. They thought, ‘It is a spirit.’ And they screamed out.

50They all saw him and they were very afraid. But immediately, Jesus said to them, ‘Be brave. It is I. Do not be afraid.’