Matthew Poole and continuators on Ezekiel 33:3

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

Of the Enemy, or any other danger, which he may foresee, in any of the causes, or forerunners of it.

i. e. Coming, approaching to the Land.

Sound the alarm, the sound of the Trumpet is a warning, yet to this sometimes 'tis necessary to add a warning by word of mouth, and tell people, brought together by the Trumpet, what he seeth.