Genesis 21:29-33 English Standard Version (ESV)

29. And Abimelech said to Abraham, “What is the meaning of these seven ewe lambs that you have set apart?”

30. He said, “These seven ewe lambs you will take from my hand, that this may be a witness for me that I dug this well.”

31. Therefore that place was called Beersheba, because there both of them swore an oath.

32. So they made a covenant at Beersheba. Then Abimelech and Phicol the commander of his army rose up and returned to the land of the Philistines.

33. Abraham planted a tamarisk tree in Beersheba and called there on the name of the Lord, the Everlasting God.

Genesis 21