Psalms 101:5

“Whoso privily slandereth his neighbour, him will I cut off, etc.] That raises and spreads a false report of him; that insinuates evil things of him; that brings false charges and accusations against him, in a private manner, when he has no opportunity to defend himself: such an one David threatens to cut off from his presence, as Kimchi interprets it; from all communion and conversation with him; and yet he listened to the slanders of Ziba against Mephibosheth: but Christ, who knows the hearts and the secret actions of men, will reject and cut off all persons of such a character: the Targum is, “he that speaketh with a triple tongue against his neighbour, him will I destroy, and he shall be…”

“Whoso privily slandereth his neighbour - literally, “One who speaks concerning his neighbor in secret.” If a man has any good to say of another, he will be likely to say it openly; if he has any evil to say, it will be likely to be said in secret. Hence, to speak in secret of anyone comes to mean the same thing as to slander him. Him will I cut off - That is, I will cut him off from me; I will not employ him. He would not have one in his house, or in his service, who did injustice to the character of others; who stabbed their reputation in the dark. This was alike indicative of the personal character of the author of the psalm, and of his purpose as the head of a family. It is hardly…”

“Whoso: Psa 15:3, Psa 50:20; Exo 20:16, Exo 23:1; Lev 19:16; Pro 10:18, Pro 20:19, Pro 25:23; Eze 22:9; Co1 5:11; Ti1 3:11; Tit 2:3 an high: Psa 10:2-4, Psa 18:27, Psa 138:6; Sa1 2:3; Job 40:11, Job 40:12; Pro 6:16-19, Pro 30:13; Isa 2:11; Dan 4:37; Oba 1:3, Oba 1:4; Luk 18:14; Pe1 5:5, Pe1 5:6 Psalms 101:6”