Book X - Chapter V - How Sir Tristram met at the peron with Sir Launcelot, and how they fought together unknown.
THEN departed Sir Tristram and rode straight unto Camelot, to the peron that Merlin had made to-fore, where Sir Lanceor, that was the king's son of Ireland, was slain by the hands of Balin. And in that same place was the fair lady Colombe slain, that was love unto Sir Lanceor; for after he was dead she took his sword and thrust it through her body. And by the craft of Merlin he made to inter this knight, Lanceor, and his lady, Colombe, under one stone. And at that time Merlin prophesied that in that same place should fight two the best knights that ever were in Arthur's days, and the best lovers. So when Sir Tristram came to the tomb where Lanceor and his lady were buried he looked about him after Sir Palomides. Then was he ware of a seemly knight came riding against him all in white, with a covered shield. When he came nigh Sir Tristram he said on high: Ye be welcome, sir knight, and well and truly have ye holden your promise. And then they dressed their shields and spears, and came together with all their might of their horses; and they met so fiercely that both their horses and knights fell to the earth, and as fast as they might avoided their horses, and put their shields afore them; and they struck together with bright swords, as men that were of might, and either wounded other wonderly sore, that the blood ran out upon the grass. And thus they fought the space of four hours, that never one would speak to other one word, and of their harness they had hewn off many pieces. O Lord Jesu, said Gouvernail, I marvel greatly of the strokes my master hath given to your master. By my head, said Sir Launcelot's servant, your master hath not given so many but your master has received as many or more. O Jesu, said Gouvernail, it is too much for Sir Palomides to suffer or Sir Launcelot, and yet pity it were that either of these good knights should destroy other's blood. So they stood and wept both, and made great dole when they saw the bright swords over-covered with blood of their bodies.
Then at the last spake Sir Launcelot and said: Knight, thou fightest wonderly well as ever I saw knight, therefore, an it please you, tell me your name. Sir, said Sir Tristram, that is me loath to tell any man my name. Truly, said Sir Launcelot, an I were required I was never loath to tell my name. It is well said, said Sir Tristram, then I require you to tell me your name? Fair knight, he said, my name is Sir Launcelot du Lake. Alas, said Sir Tristram, what have I done! for ye are the man in the world that I love best. Fair knight, said Sir Launcelot, tell me your name? Truly, said he, my name is Sir Tristram de Liones. O Jesu, said Sir Launcelot, what adventure is befallen me! And therewith Sir Launcelot kneeled down and yielded him up his sword. And therewith Sir Tristram kneeled adown, and yielded him up his sword. And so either gave other the degree. And then they both forthwithal went to the stone, and set them down upon it, and took off their helms to cool them, and either kissed other an hundred times. And then anon after they took off their helms and rode to Camelot. And there they met with Sir Gawaine and with Sir Gaheris that had made promise to Arthur never to come again to the court till they had brought Sir Tristram with them.