16:4-6 Abram's unhappy marriage to Hagar very soon made a great deal of mischief. We may thank ourselves for the guilt and grief that follow us, when we go out of the way of our duty. See it in this case, Passionate people often quarrel with others, for things of which they themselves must bear the blame. Sarai had given her maid to Abram, yet she cries out, My wrong be upon thee. That is never said wisely, which pride and anger put into our mouths. Those are not always in the right, who are most loud and forward in appealing to God: such rash and bold imprecations commonly speak guilt and a bad cause. Hagar forgot that she herself had first given the provocation, by despising her mistress. Those that suffer for their faults, ought to bear it patiently, 1Pe 2:20.

3. Sarai … gave her to … Abram to be his wife—"Wife" is here used to describe an inferior, though not degrading, relation, in countries where polygamy prevails. In the case of these female slaves, who are the personal property of his lady, being purchased before her marriage or given as a special present to her, no one can become the husband's secondary wife without her mistress consent or permission. This usage seems to have prevailed in patriarchal times; and Hagar, Sarai's slave, of whom she had the entire right of disposing, was given by her mistress' spontaneous offer, to be the secondary wife of Abram, in the hope of obtaining the long-looked-for heir. It was a wrong step—indicating a want of simple reliance on God—and Sarai was the first to reap the bitter fruits of her device.