"And the angel of the Lord found her [Hagar] by a fountain of water in the wilderness, by the fountain in the way of Shar and the angel of the Lord said unto her. . . .and she called the name of the Lord [Jehovah] that spake unto her, Thou God [El, meaning strength] seest me. . . ."
Here the 'angel of the Lord' is compared with Jehovah and El.