Matthew 27:3

Then Judas, who had betrayed Him [to the Jewish leaders], when he saw that Jesus had been condemned to die, changed his mind [i.e., about betraying Him] and brought back the thirty silver coins [Note: See Matt. 26:15 for the amount of money involved] to the leading priests and [Jewish] elders,

Matthew 26:14-16

Then one of the twelve apostles, named Judas Iscariot, went to the leading priests

Matthew 26:47-50

And while He was still speaking, Judas, one of the twelve apostles, came with a large crowd who were carrying swords and clubs. They had come from the leading priests and elders of the [Jewish] people.

Mark 14:10-11

Now Judas Iscariot, who was one of the twelve apostles, left and went to the leading priests in order to make arrangements for turning Jesus over to them.

Mark 14:43-46

And immediately, as Jesus was still speaking, Judas, one of the twelve apostles came with a crowd who were carrying swords and clubs. [They had come] from the leading priests, the experts in the law of Moses and the [Jewish] elders.

Luke 22:2-6

And the leading priests and experts in the law of Moses were looking for a way to kill Jesus because they were afraid of the people [i.e., that people would riot if it were done during the Festival. See Matt. 26:5].

Luke 22:47-48

While He was still speaking suddenly one of the twelve apostles, named Judas, [who was] leading a crowd, came near Jesus to kiss Him.

John 13:2

The devil had already filled the heart of Judas Iscariot, Simon's son, with the desire to turn Jesus over [i.e., to the Jewish authorities]. During the [Passover] meal,

John 13:27

Then after [he ate] the piece of bread, Satan entered Judas' heart. So, Jesus said to him, "Do what you are going to do, and do it quickly."

John 18:3

So, Judas took a detachment of [Roman] soldiers and some [Temple] guards sent from the leading priests and Pharisees, and carrying lanterns, torches and weapons, they went to the orchard.

2 Corinthians 7:10

For the sorrow that God desires produces repentance [i.e., a change of heart and life] that leads to salvation, and which brings no regrets. But the sorrow of the world [i.e., sorrow for wrongdoing for reasons unrelated to God or moral principles] produces [spiritual] death.

Treasury of Scripture Knowledge

Summary

Then Judas, which had betrayed him, when he saw that he was condemned, repented himself, and brought again the thirty pieces of silver to the chief priests and elders,

General references

Bible References

Repented

2 Corinthians 7:10
For the sorrow that God desires produces repentance [i.e., a change of heart and life] that leads to salvation, and which brings no regrets. But the sorrow of the world [i.e., sorrow for wrongdoing for reasons unrelated to God or moral principles] produces [spiritual] death.

General references

Mark 6:26
And the king became very distressed [over such a gruesome request], but because he had promised her with oaths, and [to keep from looking bad] in front of his party guests, he did not refuse her [request].
Luke 14:30
saying, 'This man began to build [a tower] but was not able to finish it.'