And Abram was fourscore and six years old, when Hagar bare Ishmael to Abram.

Matthew Henry's Concise Commentary

16:7-16 Hagar was out of her place, and out of the way of her duty, and going further astray, when the Angel found her. It is a great mercy to be stopped in a sinful way, either by conscience or by providence. Whence comest thou? Consider that thou art running from duty, and the privileges thou wast blest with in Abram's tent. It is good to live in a religious family, which those ought to consider who have this advantage. Whither wilt thou go? Thou art running into sin; if Hagar return to Egypt, she will return to idol gods, and into danger in the wilderness through which she must travel. Recollecting who we are, would often teach us our duty. Inquiring whence we came, would show us our sin and folly. Considering whither we shall go, discovers our danger and misery. And those who leave their space and duty, must hasten their return, how mortifying soever it be. The declaration of the Angel, I will, shows this Angel was the eternal Word and Son of God. Hagar could not but admire the Lord's mercy, and feel, Have I, who am so unworthy, been favoured with a gracious visit from the Lord? She was brought to a better temper, returned, and by her behaviour softened Sarai, and received more gentle treatment. Would that we were always suitably impressed with this thought, Thou God seest me!

Matthew Henry's Whole Bible Commentary

Verses 15-16

It is here taken for granted, though not expressly recorded, that Hagar did as the angel commanded her, returning to here mistress and submitting herself; and then, in the fulness of time, she brought forth her son. Note, Those who obey divine precepts shall have the comfort of divine promises. This was the son of the bond-woman that was born after the flesh (Gal. 4:23), representing the unbelieving Jews, v. 25. Note, 1. Many who can call Abraham father are yet born after the flesh, Mt. 3:9. 2. The carnal seed in the church are sooner brought forth than the spiritual. It is an easier thing to persuade men to assume the form of godliness than to submit to the power of godliness.