Then Sir Launcelot avoided his horse, and dressed his shield afore him, and drew his sword; and so stood they together and gave many sad strokes, that all men on both parties had thereof passing great wonder. But when Sir Launcelot felt Sir Gawaine’s might so marvellously increase, he then withheld his courage and his wind, and kept himself wonder covert of his might; and under his shield he traced and traversed here and there, to break Sir Gawaine’s strokes and his courage; and Sir Gawaine enforced himself with all his might and power to destroy Sir Launcelot; for as the French book saith, ever as Sir Gawaine’s might increased, right so increased his wind and his evil will. Thus Sir Gawaine did great pain unto Sir Launcelot three hours, that he had right great pain for to defend him.

And when the three hours were passed, that Sir Launcelot felt that Sir Gawaine was come to his own proper strength, then Sir Launcelot said unto Sir Gawaine: Now have I proved you twice, that ye are a full dangerous knight, and a wonderful man of your might; and many wonderful deeds have ye done in your days, for by your might increasing you have deceived many a full noble and valiant knight; and, now I feel that ye have done your mighty deeds, now wit you well I must do my deeds.

Le Morte D'Arthur