Who did King Uther promise to give his newborn child to?

King Uther Pendragon promised to give his newborn child, Arthur, to Merlin, the wizard. Uther sought Merlin's guidance after the child's birth, as he wanted to ensure Arthur's safety from enemies who might threaten him. Merlin agreed to take the child and raise him in secrecy, away from the dangers of the kingdom. This promise set the stage for Arthur's eventual rise to become a legendary king.