But Sir Gawaine from it passed nine of the clock waxed ever stronger and stronger, for then it came to the hour of noon, and thrice his might was increased. All this espied Sir Marhaus and had great wonder how his might increased, and so they wounded other passing sore. And then when it was past noon, and when it drew toward evensong, Sir Gawaine’s strength feebled, and waxed passing faint that unnethes he might dure any longer, and Sir Marhaus was then bigger and bigger.

Malory's Le Morte d'Arthur