John Trapp on Psalms 149:7

Verſ. 7 To execute vengeance upon the Heathen] viz. Upon a juſt calling, and not for private revenge; yea that ſouldier can never anſwer it to God, that ſtrikes not more as a Juſticer than as an enemy, bee his cauſe never ſo good. But that's the moſt noble vengeance that is executed upon mens luſts; whilſt they thruſt the ſword of the Spirit into the throats of them, and let out their life-blood. That's a good ſenſe that ſome give of theſe words, viz. that the Saints when they go forth to battel, ſhould go with holy ſongs in their mouths, as well as with ſwords in their hands. See Judg. 7.19, 20, &c. Uſſier. Brit. [illegible: 1 letter] cleſ. [illegible: 1 letter] mord. & 2 Chron. 20.21, &c. the victoria Hallelujatica, was got on this manner here in Britaine, under the conduct of Germanus, againſt a mighty army of Pelagian Picte and Saxons. This was the courſe and cuſtome of the [illegible: 1 word] in [illegible: 1 word] againſt their Popiſh perſecutors; and the like wee read of the other French Proteſtants at the ſiedge of [illegible: 1 word], that I mention not thoſe gallant Spirits at [illegible: 1 word] battel with their reboated, Now for the fruit of prayer; together with the many Pſalms ſung by that religious army in their ſeverall ſtations, whereof I have been an ear-witneſs.