If what he seeth the sword come upon the land,.... Or those that kill with the sword, as the Targum; as soon as he observes a body of armed men, more or less, marching towards the borders of the land with a manifest intention to enter and invade it:

he blow the trumpet, and warn the people; warn the people by blowing the trumpet, the signal agreed on; by which they would understand that an enemy was at hand, or danger near; or warn them by word of mouth, as well as by the trumpet, where he could do it, and when it was necessary.

If when he seeth the sword come upon the land, he blow the trumpet, and warn the people;

3. the sword-invaders. An appropriate illustration at the time of the invasion of Judea by Nebuchadnezzar.

33:1-9 The prophet is a watchman to the house of Israel. His business is to warn sinners of their misery and danger. He must warn the wicked to turn from their way, that they may live. If souls perish through his neglect of duty, he brings guilt upon himself. See what those have to answer for, who make excuses for sin, flatter sinners, and encourage them to believe they shall have peace, though they go on. How much wiser are men in their temporal than in their spiritual concerns! They set watchmen to guard their houses, and sentinels to warn of the enemies' approach, but where the everlasting happiness or misery of the soul is at stake, they are offended if ministers obey their Master's command, and give a faithful warning; they would rather perish, listening to smooth things.