Charles H. Spurgeon on Psalms 140:2

Continually are they gathered together for war. Literally, this clause reads, who gather wars, and so some understand it. But it is well known that the prepositions are often omitted in the Hebrew, and no doubt he means that they stirred up general enmity by their false information which acted as a trumpet sounding to battle. —John Calvin.

Verses 2-3. The wicked assault the righteous with three weapons: —with the heart, by conspiracy; with the tongue, by lying; and with the hand, by violence. —John Lorinus, 1569-1634.