The angel of the Lord found Hagar near a spring in the desert; it was the spring that is beside the road to Shur.
Genesis 16:7 (NIV)
The first time "the angel of the LORD" is mentioned in scripture, it's when an angel visits Hagar after she is afflicted by Sarai.
Sarai is a part of "the People of God," and yet God is rescuing Hagar because of Sarai. There is a lesson here.