2 Samuel 3:26

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

Proverbs 26:23-26

Burning lips and a wicked heart are like a potsherd covered with silver dross.

Proverbs 27:4-6

Wrath is cruel, and anger is outrageous; but who is able to stand before envy?

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
Burning lips and a wicked heart are like a potsherd covered with silver dross.
Proverbs 27:4
Wrath is cruel, and anger is outrageous; but who is able to stand before envy?