Mark 6:50

But he at once spoke with them, saying. "Courage! It is I. Do not be afraid!"

Matthew 14:27

But at once Jesus spoke to them, "Courage," he said, "it is I. Fear not."

Luke 24:38-41

And he said to them. "Why are you disturbed? And why do questions rise in your hearts?

John 6:19-20

After they had rowed three or four miles, they saw Jesus walking upon the sea, and drawing near to the boat, and they were terrified;

John 20:19-20

On the evening of that same day, the first day of the week, although the doors of the room where the disciples gathered had been locked for fear of the Jews, Jesus came, and there he stood among them, saying. "Peace to you!"

Treasury of Scripture Knowledge

Summary

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.

General references

Bible References

It is i

Matthew 14:27
But at once Jesus spoke to them, "Courage," he said, "it is I. Fear not."
Luke 24:38
And he said to them. "Why are you disturbed? And why do questions rise in your hearts?
John 6:19
After they had rowed three or four miles, they saw Jesus walking upon the sea, and drawing near to the boat, and they were terrified;
John 20:19
On the evening of that same day, the first day of the week, although the doors of the room where the disciples gathered had been locked for fear of the Jews, Jesus came, and there he stood among them, saying. "Peace to you!"

General references

Luke 24:37
They were startled and terrified and thought that they were seeing a ghost.