The New Testament of the Christian Bible mentions Jesus' siblings, but their exact number is not specified. In the Gospel of Matthew 13:55-56 and the Gospel of Mark 6:3, Jesus is described as having siblings. In Matthew, his brothers are named James, Joseph, Simon, and Judas, and it also mentions sisters without naming them. However, the interpretation of these passages varies among different Christian traditions, and there is no consensus on the exact number of siblings Jesus had. Some traditions interpret these passages to mean that Jesus had biological siblings, while others interpret them differently, suggesting that they could be cousins or other close relatives.