page 35 of 960 of Sir Thomas Malory: Le Morte Darthur: The Definitive Original Text Edition

035:

Questynge beste is being hunted by King Pellynor. Pellynor takes Arthur’s horse. Merlin shows up in disguise of a 14 year old who says he knows who Arthur’s father is (Uther). Merlin departs but comes back, this time disguised as an old man who tells him that the 14 year old was right and that he also is guilty of incest (and God is displeased with him).