The presence of persons belonging to another religion was usually regarded by the ancients as a profanation of the rites. In the case of the Greek mysteries such intrusion is said to have been punished by death. Consequently Jehu could give these injunctions without arousing any suspicion.

None of the servants of the Lord - Though he was not attached to that service, yet he would tolerate it; and as he was led to suppose that he was fulfilling the will of Jehovah in what he was doing, he would of course treat his worship and worshippers with the more respect.

He might have ordered the search to be made on pretense of expelling any of those whom they would consider the profane, especially as this was "a solemn assembly for Baal," as was the custom with the heathen when any extraordinary exhibition of or for their god was expected; thus Callimachus, (Hymn to Apollo), after imagining the temple and its suburbs to be shaken by the approach of Apollo, cries out, Εκας, ἑκας, ὁστις, αλιτρος. To prevent any suspicion of his real design, such might have been Jehu's plea, else alarm must have been excited, and perhaps some would have escaped.

And Jehu went, and Jehonadab the son of Rechab, into the house of Baal,.... Who no doubt was led into the secret, and knew the design of Jehu, or he would not have gone into such an idolatrous place:

and said unto the worshippers of Baal, search and look, that there be here with you none of the servants of the Lord, but the worshippers of Baal only; pretending a great regard to the purity of their worship and sacrifices, that they might not be profaned (t) by the company of such who were not worshippers of Baal, but of Jehovah; whereas his view was to prevent any of the worshippers of God perishing with them, who might out of curiosity go in among them, to behold the manner of their service.

(t) "----procul, o procul este profani". Virgil. Aeneid. 6. ver. 258.

Jehu then came with Jehonadab to the temple, and commanded the worshippers of Baal to be carefully examined, that there might not be one of the worshippers of Jehovah with (among) them. When the priests of Baal were preparing to offer sacrifice, Jehu had eighty men of his guards stationed before the temple, and laid this injunction upon them: "Whoever lets one of the men escape whom I bring into your hands (we must read ימלּט instead of ימּלט), his life shall answer for his (the escaped man's) life. נפשׁו תּחת נפשׁו, as in 1 Kings 20:39.

And Jehu went, and Jehonadab the son of Rechab, into the house of Baal, and said unto the worshippers of Baal, Search, and look that there be here with you none of the {i} servants of the LORD, but the worshippers of Baal only.

(i) Thus God would have his servants preserved and idolaters destroyed, as in his law he gives express command, De 13:5.

10:15-28 Is thine heart right? This is a question we should often put to ourselves. I make a fair profession, have gained a reputation among men, but, is my heart right? Am I sincere with God? Jehonadab owned Jehu in the work, both of revenge and of reformation. An upright heart approves itself to God, and seeks no more than his acceptance; but if we aim at the applause of men, we are upon a false foundation. Whether Jehu looked any further we cannot judge. The law of God was express, that idolaters were to be put to death. Thus idolatry was abolished for the present out of Israel. May we desire that it be rooted out of our hearts.