Matthew 14:5

He was anxious to kill him but he was afraid of the people, for they held John to be a prophet.

Matthew 11:9

Come, why did you go out? To see a prophet? Yes, I tell you, and far more than a prophet.

Matthew 21:26

And if we say, 'From men,' we are afraid of the crowd, for they all hold that John was a prophet."

Matthew 21:32

For John showed you the way to be good and you would not believe him; the taxgatherers and harlots believed him, and even though you saw that, you would not change your mind afterwards and believe him.

Mark 6:19-20

Herodias had a grudge against him; she wanted him killed but she could not manage it,

Mark 11:30-32

What about the baptism of John? Was it from heaven or from men?"

Mark 14:1-2

The passover and the festival of unleavened bread fell two days later; so the high priests and scribes were trying how to get hold of him by craft and have him put to death.

Luke 20:6

And if we say, 'From men,' the whole of the people will stone us, for they are convinced John was a prophet."

Acts 4:21

Then they threatened them still further and let them go; on account of the people they found themselves unable to find any means of punishing them, for everybody was glorifying God over what had happened

Acts 5:26

At this the commander went off with the attendants and fetched them ??but without using violence, for fear that the people would pelt them with stones.

Treasury of Scripture Knowledge

Summary

And when he would have put him to death, he feared the multitude, because they counted him as a prophet.

Bible References

When

Mark 6:19
Herodias had a grudge against him; she wanted him killed but she could not manage it,
Mark 14:1
The passover and the festival of unleavened bread fell two days later; so the high priests and scribes were trying how to get hold of him by craft and have him put to death.
Acts 4:21
Then they threatened them still further and let them go; on account of the people they found themselves unable to find any means of punishing them, for everybody was glorifying God over what had happened
Acts 5:26
At this the commander went off with the attendants and fetched them ??but without using violence, for fear that the people would pelt them with stones.

Because

Matthew 21:26
And if we say, 'From men,' we are afraid of the crowd, for they all hold that John was a prophet."
Mark 11:30
What about the baptism of John? Was it from heaven or from men?"
Luke 20:6
And if we say, 'From men,' the whole of the people will stone us, for they are convinced John was a prophet."