Exodus 12:11

11Now you are to eat it in this manner: [be prepared for a journey] with your 12:11 A variation of a phrase often found in the Bible that is an urgent call to get ready for immediate action, or to prepare for a coming action or event. The phrase is related to the type of clothing worn in ancient times. To keep from impeding the wearer during any vigorous activity, e.g. battle, exercise, strenuous work, etc., the loose ends of garments (tunics, cloaks, mantles, etc.) had to be gathered up and tucked into the girdle. The girdle was a band about six inches wide that had fasteners in front. It was worn around the loins (the midsection of the body between the lower ribs and the hips) and was normally made of leather. The girdle (band) also served as a kind of pocket or pouch and was used to carry personal items such as a dagger, money or other necessary things. Gird up your mind or gird up your heart are examples of variants of this phrase and call for mental or spiritual preparation for a coming challenge.loins girded [that is, with the outer garment tucked into the band], your sandals on your feet, and your staff in your hand; you shall eat it quickly—it is the Lord’s Passover.