Cross reference
2 Samuel 3:26
26 And when Joab had come out from David, he sent men after Abner, and they overtook him at the water-spring of Sirah, and made him come back with them: but David had no knowledge of it.
Proverbs 26:23-26
23 Smooth lips and an evil heart are like a vessel of earth plated with silver waste.
24 With his lips the hater makes things seem what they are not, but deceit is stored up inside him;
25 When he says fair words, have no belief in him; for in his heart are seven evils:
26 Though his hate is covered with deceit, his sin will be seen openly before the meeting of the people.
Proverbs 27:4-6
4 Wrath is cruel, and angry feeling an overflowing stream; but who does not give way before envy?
5 Better is open protest than love kept secret.
6 The wounds of a friend are given in good faith, but the kisses of a hater are false.