John 6:20

They were terrified; but He called to them. "It is I," He said, "do not be afraid."

Matthew 14:27-31

But instantly Jesus spoke to them, and said, "There is no danger; it is I; do not be afraid."

Mark 6:50

for they all saw Him and were terrified. He, however, immediately spoke to them. "There is no danger," He said; "it is I; be not alarmed."

Mark 16:6

But he said to them, "Do not be terrified. It is Jesus you are looking for--the Nazarene who has been crucified. He has come back to life: He is not here: this is the place where they laid Him.

Revelation 1:17-18

When I saw Him, I fell at His feet as if I were dead. But He laid His right hand upon me and said, "Do not be afraid: I am the First and the Last, and the ever-living One.

Treasury of Scripture Knowledge

Summary

But he saith unto them, It is I; be not afraid.

Bible References

It is

Matthew 14:27
But instantly Jesus spoke to them, and said, "There is no danger; it is I; do not be afraid."
Mark 6:50
for they all saw Him and were terrified. He, however, immediately spoke to them. "There is no danger," He said; "it is I; be not alarmed."
Mark 16:6
But he said to them, "Do not be terrified. It is Jesus you are looking for--the Nazarene who has been crucified. He has come back to life: He is not here: this is the place where they laid Him.
Revelation 1:17
When I saw Him, I fell at His feet as if I were dead. But He laid His right hand upon me and said, "Do not be afraid: I am the First and the Last, and the ever-living One.