Genesis 16:7

Then God opened her eyes, and she saw a well of water; and she went and filled the skin with water and gave the boy a drink.

But the angel of Yahweh called to him from heaven and said, “Abraham, Abraham!” And he said, “Here I am.”

“Yahweh, the God of heaven, who took me from my father’s house and from the land of my kin, and who spoke to me and who swore to me, saying, ‘To your seed I will give this land,’ He will send His angel before you, and you will take a wife for my son from there.

“Then the angel of God said to me in the dream, ‘Jacob,’ and I said, ‘Here I am.’

And the angel of Yahweh appeared to him in a blazing fire from the midst of the bush; and he looked, and behold, the bush was burning with fire, yet the bush was not consumed.

Then Moses had Israel set out from the Red Sea, and they went out into the wilderness of Shur; and they went three days in the wilderness and found no water.

So Saul struck the Amalekites, from Havilah as you go to Shur, which is east of Egypt.