III. The warning given to Judah not to sin after the similitude of Israel's transgression. It is said in the close of v. 14, Those that do not understand shall fall; those must needs fall that do not understand how to avoid, or get over, the stumbling-blocks they meet with (and therefore let him that thinks he stands take heed lest he fall), particularly the two tribes (v. 15): Though thou, Israel, play the harlot, yet let not Judah offend. Though Israel be given to idolatry, yet let not Judah take the infection. Now, 1. This was a very needful caution. The men of Israel were brethren, and near neighbours, to the men of Judah; Israel was more numerous, and at this time in a prosperous condition, and therefore there was danger lest the men of Judah should learn their way and get a snare to their souls. Note, The nearer we are to the infection of sin the more need we have to stand upon our guard. 2. It was a very rational caution: "Let Israel play the harlot, yet let not Judah do so; for Judah has greater means of knowledge than Israel, has the temple and priesthood, and a king of the house of David; from Judah Shiloh is to come; and for Judah God has reserved great blessings in store; therefore let not Judah offend, for more is expected from them than from Israel, they will have more to answer for if they do offend, and from them God will take it more unkindly. If Israel play the harlot, let not Judah do so too, for then God will have no professing people in the world." God bespeaks Judah here, as Christ does the twelve, when many turned their backs upon him, Will you also go away? John vi. 67. Note, Those that have hitherto kept their integrity should, for that reason, still hold it fast, even in times of general apostasy. Now, to preserve Judah from offending as Israel had done, two rules are here given:—(1.) That they might not be guilty of idolatry they must keep at a distance from the places of idolatry: Come not you unto Gilgal, where all their wickedness was (ch. ix. 15; xii. 11); there they multiplied transgression (Amos iv. 4); and perhaps they contracted a veneration for that place because there it was said to Joshua, The place where thou standest is holy ground (Josh. v. 15); therefore they are forbidden to enter into Gilgal, Amos v. 5. And for the same reason they must not go up to Bethel, here called the house of vanity, for so Bethaven signifies, not the house of God, as Bethel signifies. Note, Those that would be kept from sin, and not fall into the devil's hands, must studiously avoid the occasions of sin and not come upon the devil's ground. (2.) That they might not be guilty of idolatry they must take heed of profaneness, and not swear, The Lord liveth. They are commanded to swear, The Lord liveth in truth and righteousness (Jer. iv. 2); and therefore that which is here forbidden is swearing so in untruth and unrighteousness, swearing rashly and lightly, or falsely and with deceit, or swearing by the Lord and the idol, Zeph. i. 5. Note, Those that would be steady in their adherence to God must possess themselves with an awe and reverence of God, and always speak of him with solemnity and seriousness; for those that can make a jest of the true God will make a god of any thing.