[Upon the Rock, Vol. 2, No. 7, July 1999, pp. 26-28.] A question often asked of Christians is, “Where did Cain get his wife?” This question is often asked to make fun of the Bible, and the Christian, pointing to an alleged contradiction in the Old Testament. This question, though often asked in jest, can be used to show the inquirer the inspiration of the Scriptures and their agreement with science. This question is of deadly importance, because of Adam sin entered into the world and through sin, death (Genesis 3:3, 19; Romans 5:12; 1 Corinthians 15:45). In Romans 3:23, we learn that all have sinned. So, because of the transgression of Adam and his wife, we need another ‘Adam,’ the man Jesus Christ who laid down his life as a sacrifice for all of mankind, so that we may be saved (1 Corinthians 15:21-22, 45). It is through these Scriptures that we learn that only the descendants of Adam can be saved! If we are not descended from Adam, we cannot be saved! Now, the Bible describes all humans as sinners, since the beginning, and it follows that all humans have descended from the first man, Adam, except Eve his wife (Genesis 3:20; Acts 17:26). So, now we can establish through the Scriptures that Cain’s wife must be a descendant of Adam and Eve who had many sons and daughters other than their three sons whose names we know: Cain, Abel and Seth (Genesis 5:4). If Cain’s wife was not his sister, then