Genesis 21:31
"Wherefore he called that place Beersheba; because there they sware both of them."
Cross References (ranked by relevance)
And he called it Shebah: therefore the name of the city is Beersheba unto this day.
And Abraham rose up early in the morning, and took bread, and a bottle of water, and gave it unto Hagar, putting it on her shoulder, and the child, and sent her away: and she departed, and wandered in the wilderness of Beersheba.
And Hazarshual, and Beersheba, and Bizjothjah,
Therefore I counsel that all Israel be generally gathered unto thee, from Dan even to Beersheba, as the sand that is by the sea for multitude; and that thou go to battle in thine own person.
And Judah and Israel dwelt safely, every man under his vine and under his fig tree, from Dan even to Beersheba, all the days of Solomon.
Then all the children of Israel went out, and the congregation was gathered together as one man, from Dan even to Beersheba, with the land of Gilead, unto the LORD in Mizpeh.
And he went up from thence to Beersheba.