Gen. 26:12, 23-25
12 Then Isaac sowed in that land, and reaped in the same year a hundredfold; and the Lord blessed him. . . . . 23 Then he went up from there to Beersheba. 24 And the Lord appeared to him the same night and said, "I am the God of your father Abraham; do not fear, for I [am] with you. I will bless you and multiply your descendants for My servant Abraham's sake." 25 So he built an altar there and called on the name of the Lord, and he pitched his tent there; and there Isaac's servants dug a well.