2 Samuel 2:11-13
11 and he was king over them in Hebron for 7½ years.
12 Abner, the son of Ner, and the servants of Ish-bosheth (the son of Saul) traveled from Mahanaim to Gibeon. 13 David’s general Joab, whose mother was David’s sister Zeruiah, and David’s servants went out to meet them at the pool of Gibeon. Abner’s forces were by one side of the pool, Joab’s forces by the other.Read full chapter