By the faith of my body, said Balin, I might not save her, for she slew herself suddenly. Me repenteth, said Merlin; because of the death of that lady thou shalt strike a stroke most dolorous that ever man struck, except the stroke of our Lord, for thou shalt hurt the truest knight and the man of most worship that now liveth, and through that stroke three kingdoms shall be in great poverty, misery and wretchedness twelve years, and the knight shall not be whole of that wound for many years. Then Merlin took his leave of Balin. And Balin said, If I wist it were sooth that ye say I should do such a perilous deed as that, I would slay myself to make thee a liar. Therewith Merlin vanished away suddenly.

Malory's Le Morte d'Arthur