Let the high praises of God be in their mouth, and a twoedged sword in their hand;
Let the high praises of God (be) in their mouth. "High praises of God" - i:e., praises extolling God on high (Psalms 66:17).
And a two-edged sword in their hand - such as Nehemiah and his fellow-workmen had in one hand, while with the other they worked at building the wall (Nehemiah 4:16-18). Even when they were giving thanks, they still carried swords in their hands (cf. Nehemiah 12:31, which describes a procession to the temple, in which perhaps they still bore their swords; but see note, Psalms 149:7).