Genesis 16:7

The angel of the Lord] see on Exodus 3:2. Shur] The word means 'wall' and was probably applied to the chain of fortresses on the NE. frontier of Egypt. The Desert of Shur was the wilderness bordering on these fortresses which were built to keep out Asiatic invaders.

7, 8. Hagar might flee from the presence of Sarah, but not from the knowledge and sight of God. He finds her, and addresses her, as He did Adam, when he concealed himself in the Garden of Eden: cp. Exodus 1:8; Exodus 1:9.