Judas, stung by the rebuke of Jesus at the feast, bargains with the rulers to betray Jesus

Mat 26:14-16

14 Then one of the twelve, who was named Judas Iscariot, went to the chief priests and said,
15 What will you give me, if I give him up to you? And the price was fixed at thirty bits of silver.
16 And from that time he was watching for a chance to give him into their hands.

Mar 14:10-11

10 And Judas Iscariot, who was one of the twelve, went away to the chief priests, so that he might give him up to them.
11 And hearing what he said, they were glad, and gave him their word to make him a payment of money. And he took thought how he might best give him up to them.

Luk 22:3-63 And Satan came into Judas Iscariot, who was one of the twelve.
4 And he went away and had a discussion with the chief priests and the rulers, about how he might give him up to them.
5 And they were glad, and undertook to give him money.
6 And he made an agreement with them to give him up to them, if he got a chance, when the people were not present.