Genesis 21:25-31

21:25 But Abraham lodged a complaint against Abimelech concerning a well that Abimelech’s servants had seized. 21:26 “I do not know who has done this thing,” Abimelech replied. “Moreover, you did not tell me. I did not hear about it until today.”

21:27 Abraham took some sheep and cattle and gave them to Abimelech. The two of them made a treaty. 21:28 Then Abraham set seven ewe lambs apart from the flock by themselves. 21:29 Abimelech asked Abraham, “What is the meaning of these seven ewe lambs that you have set apart?” 21:30 He replied, “You must take these seven ewe lambs from my hand as legal proof that I dug this well.” 21:31 That is why he named that place Beer Sheba, because the two of them swore an oath there.