But Onan was not willing to have a child who would not be his own heir. So whenever he had intercourse with Tamar, he spilled the semen on the ground to keep her from having a baby who would belong to his brother.
Scripture quotations marked NLT are taken from the Holy Bible, New Living Translation, copyright 1996. Used by permission of Tyndale House Publishers, Inc., Wheaton, Illinois 60189. All rights reserved. (New Living Translation - The Bible Online)