What does the Bible teach about monogamy?

WHAT DOES THE BIBLE SAY?

The Bible indicates that God's design for marriage is one man married to one woman for one lifetime. God created Adam and Eve to live in a monogamous relationship with one another (Genesis 2:24). The Mosaic Law forebade kings from having multiple wives. Besides this, the examples of polygamous relationships in the Bible serve as a warning rather than a commendation (Genesis 30; 1 Kings 11:1-8). In His discussion on divorce with the Pharisees, Jesus iterates monogamy as God's standard for male/female relationships, indicating that adultery is the only valid reason for divorce (Matthew 19:6, 8-9). Paul reinforces Christ's teaching on monogamy by comparing the marital covenant to the covenant between Christ as the church (Ephesians 5:22-24). The Bible presents monogamy not as a cultural suggestion but as a reflection of God’s faithful, covenant-keeping love.

FROM THE OLD TESTAMENT

• Monogomy as God's intent is seen in His creation of one man (Adam) and one woman (Eve). Of that couple, Scripture says, "Therefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh" (Genesis 2:24).
• Deuteronomy 17:17 commands Israel's kings not to "multiply wives" (KJV), showing that monogamy was God's standard.
• While polygamy is described in the Old Testament, it is not prescribed. In fact, the polygamous relationships highlighted in Scripture were problematic. Jacob's polygamous relationship with Rachel and Leah caused division and strife (Genesis 30). Solomon's many wives led him into idolatry (1 Kings 11:1-8).

FROM THE NEW TESTAMENT

• Jesus references Genesis 2:24 in responding to the Pharisees' question about divorce. He reinforces the teaching on monogamy: "What therefore God has joined together, let not man separate. . . . Because of your hardness of heart Moses allowed you to divorce your wives, but from the beginning it was not so. And I say to you: whoever divorces his wife, except for sexual immorality, and marries another, commits adultery" (Matthew 19:6, 8-9).
• Through Paul, the Holy Spirit provided another reason for divorce: one spouse abandoning another. In that case, the abandoned spouse is not bound in the marriage (1 Corinthians 7:15).
• In chapter 5 of Ephesians, after exhorting believers to refrain from sexual immorality and other sins, Paul likens the marriage covenant to Christ and the church (vv. 22-24) and references Genesis 2:24 (v. 31).

IMPLICATIONS FOR TODAY

"Til death do you part" . . . or until you get sick of one another or until someone better comes along or until you "fall out of love." Sadly, many people see monogamy as a quaint suggestion rather than God's ideal for marriage and suggests that those other reasons are the way we should see the marriage covenant. But stepping outside the parameters God has set for marriage doesn't end well. The pages of the Old Testament show that.

"But you don't know my husband/wife!" True. But God does. He knew about our fallibility and still presented monogamy as the ideal.  Divorce is permitted only in cases of adultery and abandonment (Matthew 19:6, 8-9;  1 Corinthians 7:15), and even then, God prefers reconciliation (Malachi 2:16).

"But I'm unhappy." Some Christians got married before they became believers, so their spouse may be unbelieving and uncaring. But God redeems even our mistakes and works them for our good (Romans 8:28). Any suffering in life can draw us closer to God, including difficult relationships. God can use even a bad marriage to make us holier—if not "happier" in the way the world would define that. Our role is to honor God by remaining monogamous even through a challenging marriage.

UNDERSTAND

• Monogamy is God's design for marriage.
• While the Bible records polygamy, it consistently presents it as problematic and never as God’s intended model for marriage.
• Scripture gives just two valid reasons for divorce: adultery or abandonment.

REFLECT

• If you are married, how do you honor God in your marriage?
• How does your view of marriage align with God’s design for lifelong monogamy, and where do you feel tension with it?
• How would your attitude toward commitment change if you consistently saw marriage as a reflection of God’s faithful love?

ENGAGE

• Why does modern culture often treat monogamy as optional rather than foundational, and how should Christians respond?
• What do the biblical warnings about polygamy reveal about the importance of faithfulness and covenant commitment in relationships?
• How can believers practically support couples and singles in embracing God’s design for marriage?