Genesis 26:23-25

23Then he went up from there to Beersheba.

24The Lord appeared to him the same night and said, “I am the God of Abraham your father; Do not be afraid, for I am with you. I will bless and favor you, and multiply your descendants, For the sake of My servant Abraham.”

25So Isaac built an altar there and called on the name of the Lord [in prayer]. He pitched his tent there; and there Isaac’s servants dug a well.