4Then the king said to Amasa, “Summon the men of Judah to come to me within three days, and be here yourself.”
5So Amasa went to summon Judah, but he took longer than the time allotted him.
6And David said to Abishai, “Now Sheba the son of Bichri will do us more harm than Absalom. Take your lord’s servants and pursue him, or he will find fortified cities and elude us.”
7So Joab’s men, along with the Cherethites, the Pelethites, and all the mighty men, marched out of Jerusalem in pursuit of Sheba son of Bichri.
8And while they were at the great stone in Gibeon, Amasa joined them. Now Joab was dressed in military attire, with a dagger strapped to his belt. And as he stepped forward, he slipped the dagger from its sheath.
— 2 Samuel 20:4-8