Luke 22:6 KJV

And he promised, and sought opportunity to betray him unto them in the absence of the multitude.
Luke 22:6, King James Version

In context

5 And they were glad, and covenanted to give him money.

6 And he promised, and sought opportunity to betray him unto them in the absence of the multitude.

7 Then came the day of unleavened bread, when the passover must be killed.