what does the bible say?
Concubines were women in secondary, unequal marital-like relationships in the Old Testament that were culturally practiced but never part of God’s original design for marriage (Genesis 16:1–4; 2:24). They often led to jealousy, tension, and broken family relationships, showing the cost of moving outside God’s intent for covenant love (Genesis 16:4–6; 29–30). Scripture records them in the lives of figures like Abraham, Jacob, and David but never presents them as the ideal or command (Genesis 30:3–12; 2 Samuel 5:13). God’s design for marriage consistently points back to one man and one woman in lifelong unity (Genesis 2:24). Jesus reaffirmed this design, calling marriage a permanent, exclusive covenant (Matthew 19:4–6). Further, the New Testament reinforces sexual faithfulness within marriage and rejects sexual immorality outside it (Hebrews 13:4; 1 Thessalonians 4:3–5). The reality of concubines in the Old Testament and the issues they brought emphasize that God’s design for marriage is exclusive, faithful, and meant to reflect Christ’s committed love for His people (Ephesians 5:25–32).