Book I - Chapter XXIV - How Merlin saved Arthur's life, and threw an enchantment on King Pellinore and made him to sleep.
THEREWITHAL came Merlin and said, Knight, hold thy hand, for an thou slay that knight thou puttest this realm in the greatest damage that ever was realm: for this knight is a man of more worship than thou wotest of. Why, who is he? said the knight. It is King Arthur. Then would he have slain him for dread of his wrath, and heaved up his sword, and therewith Merlin cast an enchantment to the knight, that he fell to the earth in a great sleep. Then Merlin took up King Arthur, and rode forth on the knight's horse. Alas! said Arthur, what hast thou done, Merlin? hast thou slain this good knight by thy crafts? There liveth not so worshipful a knight as he was; I had liefer than the stint of my land a year that he were alive. Care ye not, said Merlin, for he is wholer than ye; for he is but asleep, and will awake within three hours. I told you, said Merlin, what a knight he was; here had ye been slain had I not been. Also there liveth not a bigger knight than he is one, and he shall hereafter do you right good service; and his name is Pellinore, and he shall have two sons that shall be passing good men; save one they shall have no fellow of prowess and of good living, and their names shall be Percivale of Wales and Lamerake of Wales, and he shall tell you the name of your own son, begotten of your sister, that shall be the destruction of all this realm.