Genesis 16:4

4.Her mistress was despised in her eyes. Here Moses relates that the punishment of excessive precipitancy quickly followed. The chief blame, indeed, rested with Sarai; yet because Abram had proved himself too credulous, God chastises both as they deserve. Sarai is grievously and bitterly tried, by the proud contempt of her handmaid; Abram is harassed by unjust complaints; thus we see that both pay the penalty of their levity, and that the contrivance devised by Sarai, and too eagerly embraced by Abram, fails of success. Meanwhile, in Hagar, an instance of ingratitude is set before us; because she, having been treated with singular kindness and honor, begins to hold her mistress in contempt. Since, however, this is an exceedingly common disease of the mind, let the faithful accustom themselves to the endurance of it; if, at any time, a return so unjust be made to them, for their acts of kindness. But especially, let the infirmity of Sarai move us thus to act, since she was unable to bear the contempt of her maid.