Le Morte dArthur Vol. 2 Chap. 13.5
              CHAPTER V. How King Arthur shewed the stone hoving
             on the water to Galahad, and how he drew out the sword.

    THE queen heard thereof, and came after with many ladies, and shewed them the stone where it hoved on the water. Sir said the king unto Sir Galahad, here is a great marvel as ever I saw, and right good knights have assayed and failed. Sir said Galahad that is no marvel, for this adventure is not theirs but mine; and for the surety of this sword I brought none with me, for here by my side hangeth the scabbard. And anon he laid his hand on the sword, and lightly drew it out of the stone, and put it in the sheath, and said unto the king: Now it goeth better than it did afore hand. Sir, said the king, a shield God shall send you. Now have I that sword that sometime was the good knight's, Balin le Savage, and he was a passing good man of his hands; and with this sword he slew his brother Balan, and that was great pity, for he was a good knight, and either slew other through a dolorous stroke that Balin gave unto my grandfather King Pelles, the which is not yet whole, nor not shall be till I heal him.

    Therewith the king and all espied where came riding down the river a lady on a white palfrey toward them. Then she saluted the king and the queen, and asked if that Sir Launcelot was there. And then he answered himself: I am here, fair lady. Then she said all with weeping: How your great doing is changed with this day in the morn. Damosel, why say you so? said Launcelot. I say you sooth, said the damosel, for ye were this day the best knight of the world, but who should say so now, he should be a liar, for there is now one better than ye, and well it is proved by the adventures of the sword whereto ye durst not set to your hand; and that is the change and leaving of your name. Wherefore I make unto you a remembrance that ye shall not ween from henceforth that ye be the best knight of the world. As touching unto that, said Launcelot, I know well I was never the best. Yes, said the damosel, that were ye, and are yet, of any sinful man of the world. And, Sir king, Nacien, the hermit, sendeth thee word, that thee shall befall the greatest worship that ever befell king in Britain; and I say you wherefore, for this day the Sangreal appeared in thy house and fed thee and all thy fellowship of the Round Table. So she departed and went that same way that she came.