Adam Clarke on Genesis 16:13

And she called the name of the Lord - She invoked (ותקרא vattikra) the name of Jehovah who spake unto her, thus: Thou God seest me! She found that the eye of a merciful God had been upon her in all her wanderings and afflictions; and her words seem to intimate that she had been seeking the Divine help and protection, for she says, Have I also (or have I not also) looked after him that seeth me? This last clause of the verse is very obscure and is rendered differently by all the versions. The general sense taken out of it is this, That Hagar was now convinced that God himself had appeared unto her, and was surprised to find that, notwithstanding this, she was still permitted to live; for it is generally supposed that if God appeared to any, they must be consumed by his glories. This is frequently alluded to in the sacred writings. As the word אחרי acharey, which we render simply after, in other places signifies the last days or after times, (see Exo 33:23), it may probably have a similar meaning here; and indeed this makes a consistent sense: Have I here also seen the Latter Purposes or Designs of him who seeth me? An exclamation which may be referred to that discovery which God made in the preceding verse of the future state of her descendants.