Genesis 16:2

2So Sarai said to Abram, “See here, the Lord has prevented me from bearing children. I am asking you to go in to [the bed of] my maid [so that she may bear you a child]; perhaps I will 16:2 This must have been an acceptable practice in that time and culture, based on the idea that the children of such a union would belong to the owner of the slave-girl. Abram undoubtedly had informed Sarai of God’s promise to him, and Sarai perhaps thought that this was necessary in order to bring about God’s plan for them.obtain children by her.” And Abram listened to Sarai and did as she said.