Discovery Box2 Samuel 2:27 
Context2:27 Joab replied, “As surely as God lives, if you had not said this, it would have been morning before the people would have abandoned pursuit 1 of their brothers!”
2 Samuel 12:27
Context12:27 Joab then sent messengers to David, saying, “I have fought against Rabbah and have captured the water supply of the city. 2
1 tn The Hebrew verb נַעֲלָה (na’alah) used here is the Niphal perfect 3rd person masculine singular of עָלָה (’alah, “to go up”). In the Niphal this verb “is used idiomatically, of getting away from so as to abandon…especially of an army raising a siege…” (see S. R. Driver, Notes on the Hebrew Text and the Topography of the Books of Samuel, 244).
2 sn The expression translated the water supply of the city (Heb “the city of the waters”) apparently refers to that part of the fortified city that guarded the water supply of the entire city. Joab had already captured this part of the city, but he now defers to King David for the capture of the rest of the city. In this way the king will receive the credit for this achievement.
