3. When they were besieged, and closely shut in, by the army of the Chaldeans, they, being told of their fault in this matter, immediately reformed, and let go all their servants that were entitled to their freedom by the law of God, as Pharaoh, who, when the plague was upon him, consented to let the people go, and bound themselves in a covenant to do so. (1.) The prophets faithfully admonished them concerning their sin. From them they heard that they should let their Hebrew servants go free, v. 10. They might have read it themselves in the book of the law, but did not, or did not heed it, therefore the prophets told them what the law was. See what need there is of the preaching of the word; people must hear the word preached because they will not make the use they ought to make of the word written. (2.) All orders and degrees of men concurred in this reformation. The king, and the princes, and all the people, agreed to let go their servants, whatever loss or damage they might sustain by so doing. When the king and princes led in this good work the people could not for shame but follow. The example and influence of great men would go very far towards extirpating the most inveterate corruptions. (3.) They bound themselves by a solemn oath and covenant that they would do this, whereby they engaged themselves to God and one another. Note, What God has bound us to by his precept, it is good for us to bind ourselves to by our promise. This covenant was very solemn: it was made in a sacred place, made before me, in the house which is called by my name (v. 15), in the special presence of God, the tokens of which, in the temple, ought to strike an awe upon them and make them very sincere in their appeals to him. It was ratified by a significant sign; they cut a calf in two, and passed between the parts thereof (v. 18, 19) with this dreadful imprecation, "Let us be in like manner cut asunder if we do not perform what we now promise." This calf was probably offered up in sacrifice to God, who was thereby made a party to the covenant. When God covenanted with Abraham, for the ratification of it, a smoking furnace and a burning lamp passed between the pieces of the sacrifice, in allusion to this federal rite, Gen. xv. 17. Note, In order that we may effectually oblige ourselves to our duty, it is good to alarm ourselves with the apprehensions of the terror of the wrath and curse to which we expose ourselves if we live in the contempt of it, that wrath which will cut sinners asunder (Matt. xxiv. 51), and sensible signs may be of use to make the impressions of it deep and durable, as here. (4.) They conformed themselves herein to the command of God and their covenant with him; they did let their servants go, though at this time, when the city was besieged, they could very ill spare them. Thus they did right in God's sight, v. 15. Though it was their trouble that drove them to it, yet he was well pleased with it; and if they had persevered in this act of mercy to the poor, to their poor servants, it might have been a lengthening of their tranquillity, Dan. iv. 27.