Psalms 52:2

“Thy tongue deviseth mischiefs, etc.] Abundance of mischiefs, in a variety of ways, against many persons, even all good men. What properly belongs to the heart is here ascribed to the tongue; because, as Aben Ezra observes, it is the interpreter and discoverer of the thoughts of the heart: out of the abundance of that the tongue speaks and declares the mischief it has devised. Doeg intended mischief to David, when he spoke to Saul, (<092209>1 Samuel 22:9,10); so antichrist devises mischiefs against the saints of the most High, to wear them out, and thinks to change times and laws, (<270725>Daniel 7:25); like a sharp razor, working deceitfully; that is, his tongue was like a razor; the razor…”

“tongue--for self. mischiefs--evil to others (Psa 5:9; Psa 38:12). working deceitfully-- (Psa 10:7), as a keen, smoothly moving razor, cutting quietly, but deeply.”

“Thy tongue deviseth mischiefs - The word rendered “mischiefs” means (a) desire, cupidity: Proverbs 10:3; then (b) fall, ruin, destruction, wickedness: Psalms 5:9; Psalms 38:12. The meaning here is, that he made use of his tongue to ruin others. Compare Psalms 50:19. The particular thing referred to here is the fact that Doeg sought the ruin of others by giving “information” in regard to them. He “informed” Saul of what Ahimelech had done; he informed him where David had been, thus giving him, also, information in what way he might be found and apprehended. All this was “designed” to bring ruin upon David and his followers. It “actually” brought ruin on Ahimelech and those associated with…”

“Deviseth - Expresses what thy wicked mind had devised. Deceitfully - Doeg pretended only to vindicate himself from disloyalty, Sa1 22:8, but he really intended to expose the priests, to the king's fury. Psalms 52:5”

“Thy: Psa 50:19, Psa 64:2-6, Psa 140:2, Psa 140:3; Pro 6:16-19, Pro 30:14; Jer 9:3, Jer 9:4, Jer 18:18; Mat 26:59; Act 6:11-13, Act 24:1, Act 24:5; Rev 12:10 like: Psa 57:4, Psa 59:7; Pro 12:18, Pro 18:21 working: Psa 109:2, Psa 120:2; Co2 4:2, Co2 11:13 Psalms 52:3”