2 Samuel 3:26

Then Joab went out from David, and he sent messengers after Abner, and they brought him back from Bor Hasirah, but David did not know [it].

Proverbs 26:23-26

[Like] {impure silver} which overlays an earthen vessel, [so are] smooth lips and an evil heart.

Proverbs 27:4-6

Cruel [is] wrath and overwhelming [is] anger, but who will stand before jealousy?

Treasury of Scripture Knowledge

Summary

And when Joab was come out from David, he sent messengers after Abner, which brought him again from the well of Sirah: but David knew it not.

Bible References

He sent

Proverbs 26:23
[Like] {impure silver} which overlays an earthen vessel, [so are] smooth lips and an evil heart.
Proverbs 27:4
Cruel [is] wrath and overwhelming [is] anger, but who will stand before jealousy?