Just Thirty Silver Coins

Then the one called Judas Iscariot went to the chief priests and asked, "What are you willing to give me if I hand him over to you?" So they counted out for him thirty silver coins.  

From then on Judas watched for an opportunity to hand him over.

Matthew 26:14-16

When evening came, Jesus was reclining at the table with the Twelve.  And while they were eating, he said, "I tell you the truth, one of you will betray me."

Matthew 26:20-21