When Judas, the one who'd betrayed Jesus, saw that Jesus had been condemned to death, he regretted what he'd done and returned the thirty silver coins to the chief priests and the elders.
Just as he was saying this, Judas—one of the twelve disciples—arrived with a mob carrying swords and clubs, sent by the chief priests, religious leaders, and elders.
When they arrived, they went upstairs to the upper room where they were staying: Peter, John, James and Andrew; Philip and Thomas; Bartholomew and Matthew; James the son of Alphaeus, Simon the Zealot, and Judas the son of James.