The knights in Ocarina of Time wield spears and wear helmets that covers their eyes. Dozens of guards patrol Hyrule Castle and its gardens, and will stop Link from progressing further by throwing him out of the castle when they spot him.
Though most players might miss it, when Zelda and Impa escape from Ganondorf on horseback, a dying knight can be found in the back alley of Hyrule Castle Town before Link goes to the Temple of Time and draws the Master Sword.
It even comes with instructions, so have fun! I will merge some Zelda posts so all will be visible again
By nasman1993, info from Zeldapedia