To gird on

to put on; to fasten around or to one securely, like a girdle; as, to gird on armor or a sword.

See also: Gird

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
Having done this, he directed one of the ladies to gird on his sword, which she did with great self-possession and gravity, and not a little was required to prevent a burst of laughter at each stage of the ceremony; but what they had already seen of the novice knight's prowess kept their laughter within bounds.