I. How the sabbath is to be sanctified, and what is the law concerning it, v. 21, 22. 1. They must rest from their worldly employment on the sabbath day, must do no servile work. They must bear no burden into the city nor out of it, into their houses nor out of them; husbandmen's burdens of corn must not be carried in, nor manure carried out; nor must tradesmen's burdens of wares or merchandises be imported or exported. There must not a loaded horse, or cart, or wagon, be seen on the sabbath day either in the streets or in the roads; the porters must not ply on that day, nor must the servants be suffered to fetch in provisions or fuel. It is a day of rest, and must not be made a day of labour, unless in case of necessity. 2. They must apply themselves to that which is the proper work and business of the day: "Hallow you the sabbath, that is, consecrate it to the honour of God and spend it in his service and worship." It is in order to this that worldly business must be laid aside, that we may be entire for, and intent upon, that work, which requires and deserves the whole man. 3. They must herein be very circumspect: "Take heed to yourselves, watch against every thing that borders upon the profanation of the sabbath." Where God is jealous we must be cautious. "Take heed to yourselves, for it is at your peril if you rob God of that part of your time which he has reserved to himself." Take heed to your souls (so the word is); in order to the right sanctifying of sabbaths, we must look well to the frame of our spirits and have a watchful eye upon all the motions of the inward man. Let not the soul be burdened with the cares of this world on sabbath days, but let that be employed, even all that is within us, in the work of the day. And, 4. He refers them to the law, the statute in this case made and provided: "This is no new imposition upon you, but is what I commanded your fathers; it is an ancient law; it was an article of the original contract; nay, it was a command to the patriarchs."