Judas Iscariot was replaced by Matthias. After the betrayal and suicide of Judas, the remaining eleven apostles decided to choose a new twelfth apostle to replace him. They narrowed down the candidates to two men, Matthias and Barsabbas. They prayed and cast lots, and Matthias was chosen to be the new apostle. He was then added to the eleven, making the twelve apostles complete again, as was prophesied in the Old Testament (Psalm 109:8). Nicolaus and Silas were also prominent members of the early Christian community, but they were not among the candidates to replace Judas.