John's knowledge of Jesus varies across gospels. In the Gospel of Mark, John preaches of a coming leader, but shows no signs of recognizing that Jesus is this leader. In Matthew, however, John immediately recognizes Jesus and John questions his own worthiness to baptize Jesus. In both Matthew and Luke, John later dispatches disciples to question Jesus about his status, asking "Are you he who is to come, or shall we look for another?" In Luke, John is a familial relative of Jesus whose birth was foretold by Gabriel. In the Gospel of John, John the Baptist himself sees the spirit descend like a dove and he explicitly preaches that Jesus is the Son of God.