2 Samuel 3:27

(27) Aside in the gate.—The gateway was a customary place of conference in the East, and Joab there awaited Abner’s return; he then took him “aside” to some place of privacy, as the LXX. reads, “by the side of the gate.” On the phrase “fifth rib,” see Note on 2 Samuel 2:23. The reason for this cold-blooded and treacherous murder on the part of Joab is expressly said to be “for the blood of Asahel his brother;” but no doubt his revenge was quickened by jealousy.