John Gill Commentary Ezekiel 39:3

"and I will smite thy bow out of thy left hand, and will cause thine arrows to fall out of thy right hand." — Ezekiel 39:3 (ASV)

And I will smite your bow out of your left hand
In which it is usually held, to have the arrow fitted to it: and I will cause your arrows to fall out of your right hand ;
where they are commonly held when put into the bow, and then the bow is drawn with it; signifying hereby, that though he should come into the land of Israel, he should not succeed; he would be stripped of his armour, and it would be useless to him: bows and arrows are put for all kind of warlike instruments; and are particularly mentioned because they were chiefly used in war when this prophecy was delivered.