"Flattered with the honor of her new position as Abraham's wife, and hoping to be the mother of the great nation to descend from him, Hagar became proud and boastful, and treated her mistress with contempt. Mutual jealousies disturbed the peace of the once happy home. Forced to listen to the complaints of both, Abraham vainly endeavored to restore harmony. Though it was at Sarah's earnest entreaty that he had married Hagar, she now reproached him as the one at fault. She desired to banish her rival; but Abraham refused to permit this; for Hagar was to be the mother of his child, as he fondly hoped, the son of promise. She was Sarah's servant, however, and he still left her to the control of her mistress. Hagar's haughty spirit would not brook the harshness which her insolence had provoked. “When Sarai dealt hardly with her, she fled from her face.” PP 145.2"
"And he went in unto Hagar, and she conceived: and when she saw that she had conceived, her mistress was despised in her eyes."
EGW directly references the events described in Genesis 16:4, specifically Hagar's contempt for Sarai after conceiving.
"She made her way to the desert, and as she rested beside a fountain, lonely and friendless, an angel of the Lord, in human form, appeared to her. Addressing her as “Hagar, Sarai's maid,” to remind her of her position and her duty, he bade her, “Return to thy mistress, and submit thyself under her hands.” Yet with the reproof there were mingled words of comfort. “The Lord hath heard thy affliction.” “I will multiply thy seed exceedingly, that it shall not be numbered for multitude.” And as a perpetual reminder of His mercy, she was bidden to call her child Ishmael, “God shall hear.” PP 145.3"
"And the angel of the Lord said unto her, Behold, thou art with child, and shalt bear a son, and shalt call his name Ishmael; because the Lord hath heard thy affliction."
The EGW passage directly quotes and references Genesis 16:11.
"And the angel of the Lord said unto her, Return to thy mistress, and submit thyself under her hands."
The EGW passage directly quotes and references Genesis 16:9.