Genesis 21-22:5 NASB
1 Then the Lord took note of Sarah as He had said, and the Lord did for Sarah as He had promised. 2 So Sarah conceived and bore a son to Abraham in his old age, at the appointed time of which God had spoken to him. 3 Abraham called the name of his son who was born to him, whom Sarah bore to him, Isaac. 4 Then Abraham circumcised his son Isaac when he was eight days old, as God had commanded him. 5 Now Abraham was one hundred years old when his son Isaac was born to him. 6 Sarah said, "God has made laughter for me; everyone who hears will laugh with me." 7 And she said, "Who would have said to Abraham that Sarah would nurse children? Yet I have borne him a son in his old age." 8 The child grew and was weaned, and Abraham made a great feast on the day that Isaac was weaned.
22 Now it came about at that time that Abimelech and Phicol, the commander of his army, spoke to Abraham, saying, "God is with you in all that you do;
23 now therefore, swear to me here by God that you will not deal falsely with me or with my offspring or with my posterity, but according to the kindness
that I have shown to you, you shall show to me and to the land in which you have sojourned." 24 Abraham said, "I swear it." 25 But Abraham complained
to Abimelech because of the well of water which the servants of Abimelech had seized. 26 And Abimelech said, "I do not know who has done this thing;
you did not tell me, nor did I hear of it until today."