Help, LORD; for the godly man ceaseth; for the faithful fail from among the children of men.  They speak vanity every one with his neighbour: with flattering lips and with a double heart do they speak.
The LORD shall cut off all flattering lips, and the tongue that speaketh proud things: who have said, “With our tongue will we prevail; our lips are our own: who is lord over us?”
“For the oppression of the poor, for the sighing of the needy, now will I arise,’ saith the LORD; ‘I will set him in safety from him that puffeth at him.”
The words of the LORD are pure words: as silver tried in a furnace of earth, purified seven times.   Thou shalt keep them, O LORD, Thou shalt preserve them from this generation for ever.
The wicked walk on every side, when the vilest men are exalted.
Psalm 12:1-8

References: Psalm 18:30; 119:140; Proverbs 30:5; Philippians 1:6; 1 Peter 1:5; Jude 1:1