John Trapp on Psalms 64:6

Verſ. 6. They ſearch out iniquities] Abſtruſiſſima quae que exquiſierunt; they ſearch the Devils Skul for new inventions, who is ready enough to lend them his ſeven heads to plot, and his ten horns to puſh at good people. How wittily wicked was Saul to deſtroy David, if he could have done it? See his counſell to the Ziphites, 1 Sam. 23.22.

They accompliſh a diligent ſearch] Heb. A ſearch ſearched, i. e. They ſeek out all occaſions, they try all tricks, they do all that can be done to undoe mee. Whereunto he fitly ſubjoyneth this Epiphonema by way of exclamation, Adeo intimum viri & cor profundum eſt, So deep is the inward part and heart of man! (for ſo I read it) ſo deep and fathomleſſe, ſo deceitfull, and deſperately wicked.