Then he performed such spells as he knew would be effective in such matters and went toward the enchanters very fast. They were so spellbound as soon as Merlin approached them that they lost sense and memory and the use of their limbs, so that a child could have killed them there, had he known how and had enough strength. Nor could they do anything but sit and look at Merlin, and from each one his harp had fallen.

Post-Vulgate Merlin