Genesis 26:23-25

Then he went up from there to Beersheba. The 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.” So 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.