"With Their Loins Girded"

And thus shall ye eat it; with your loins girded, your shoes on your feet, and your staff in your hand; and ye shall eat it in haste: it is the LORD'S passover. Exodus 12:11

Another very important part of the Eastern costume is the girdle, which is a long piece of cloth like a shawl, folded around the waist or loins. It is useful in keeping in order the long loose robes worn in those countries.

Christ frequently alludes to the uses of the girdle, and bids His people to be ready, waiting for their Lord; having their loins girded and not to sit in idleness with loose and disordered garments. These girdles are still worn by both men and women, some are worsted, some silk, and the Bedouin men often wear leather girdles.

(Bowen, Barbara M., Strange Scriptures that Perplex the Western Mind, WM B. Eerdmans Publishing Co., Grand Rapids, Michigan, 1944, pg 50)