and Sar'ai said to Abram, "Behold now, the LORD has prevented me from bearing children; go in to my maid; it may be that I shall obtain children by her." And Abram hearkened to the voice of Sar'ai.
So, after Abram had dwelt ten years in the land of Canaan, Sar'ai, Abram's wife, took Hagar the Egyptian, her maid, and gave her to Abram her husband as a wife.
And he went in to Hagar, and she conceived; and when she saw that she had conceived, she looked with contempt on her mistress.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (Revised Standard Version - Holy Bible)