Matthew 14:5

And he would have liked to put him to death, but was afraid of the people, because they regarded John as a Prophet.

Matthew 11:9

But 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 'a human origin' we have the people to fear, for they all hold John to have been a Prophet."

Matthew 21:32

For John came to you observing all sorts of ritual, and you put no faith in him: the tax-gatherers and the notorious sinners did put faith in him, and you, though you saw this example set you, were not even afterwards sorry so as to believe him.

Mark 6:19-20

Therefore Herodias hated him and wished to take his life, but could not;

Mark 11:30-32

John's Baptism--was it of Heavenly or of human origin? Answer me."

Mark 14:1-2

It was now two days before the Passover and the feast of Unleavened Bread, and the High Priests and Scribes were bent on finding how to seize Him by stratagem and put Him to death.

Luke 20:6

And if we say, 'human,' the people will all stone us; for they are thoroughly convinced that John was a Prophet."

Acts 4:21

The Court added further threats and then let them go, being quite unable to find any way of punishing them on account of the people, because all gave God the glory for the thing that had happened.

Acts 5:26

Upon this the Commander went with the officers, and brought the Apostles; but without using violence; for they were afraid of being stoned by the people.

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
Therefore Herodias hated him and wished to take his life, but could not;
Mark 14:1
It was now two days before the Passover and the feast of Unleavened Bread, and the High Priests and Scribes were bent on finding how to seize Him by stratagem and put Him to death.
Acts 4:21
The Court added further threats and then let them go, being quite unable to find any way of punishing them on account of the people, because all gave God the glory for the thing that had happened.
Acts 5:26
Upon this the Commander went with the officers, and brought the Apostles; but without using violence; for they were afraid of being stoned by the people.

Because

Matthew 21:26
and if we say 'a human origin' we have the people to fear, for they all hold John to have been a Prophet."
Mark 11:30
John's Baptism--was it of Heavenly or of human origin? Answer me."
Luke 20:6
And if we say, 'human,' the people will all stone us; for they are thoroughly convinced that John was a Prophet."