One of the most important ideas in the Bible is the covenant. The word appears hundreds of times, and the two halves of the Bible are named after it — the Old and New Testaments (covenants). Understanding the main covenants is like finding the backbone of the Bible's story.
What is a covenant?
A covenant is a solemn, binding relationship between two parties, sealed with promises. In the ancient world, kings made covenants with the nations they ruled, and people made covenants in marriage and friendship. In the Bible, God makes covenants with people, binding himself to them with promises and calling them to faithfulness in return.
Unlike a business contract, a biblical covenant is about relationship. Again and again God says, "I will be their God, and they shall be my people" (see Jeremiah 31:33).
1. The covenant with Noah
After the flood, God makes a covenant with Noah, his family and every living creature, promising never again to destroy the earth by a flood (Genesis 9:8–17). The sign of this covenant is the rainbow.
Key idea: God commits himself to preserve the world, giving time and space for his plan of rescue to unfold.
2. The covenant with Abraham
God calls Abraham and promises him three things (Genesis 12, 15 and 17):
- Land — the land of Canaan;
- Descendants — a great nation, as many as the stars;
- Blessing — "in thee shall all families of the earth be blessed" (Genesis 12:3, KJV).
In Genesis 15 God seals the covenant in a dramatic ceremony, passing alone between the divided animals — showing that he himself guarantees the promise. The sign of this covenant is circumcision (Genesis 17).
Key idea: God's plan is to bless the whole world through Abraham's family. The New Testament teaches that this blessing comes to all nations through Jesus (Galatians 3:8, 14).
3. The covenant with Israel at Sinai (the Mosaic covenant)
After rescuing Israel from Egypt, God makes a covenant with the nation at Mount Sinai through Moses (Exodus 19–24). He gives them his law, including the Ten Commandments, and calls them to be "a kingdom of priests, and an holy nation" (Exodus 19:6). The covenant includes blessings for obedience and warnings for disobedience (Deuteronomy 28). The Sabbath is described as a sign of it (Exodus 31:13).
Key idea: God shows his people how to live as his holy people. But Israel's repeated failure shows that something deeper is needed — a change of heart.
4. The covenant with David
God promises King David that his descendant will sit on his throne for ever: "thine house and thy kingdom shall be established for ever before thee" (2 Samuel 7:16, KJV). Later prophets look forward to a king from David's line who will rule with justice and peace.
Key idea: God promises a King. The New Testament announces Jesus as the "son of David" (Matthew 1:1), the King whose kingdom will never end (Luke 1:32–33).
5. The new covenant
When Israel fell into exile, the prophet Jeremiah announced a new covenant:
"I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people… for I will forgive their iniquity, and I will remember their sin no more." (Jeremiah 31:33–34, KJV)
Ezekiel adds the promise of a new heart and God's Spirit within (Ezekiel 36:26–27).
At the Last Supper Jesus took the cup and said, "This cup is the new testament in my blood" (Luke 22:20). Through his death and resurrection, Jesus establishes the new covenant, bringing complete forgiveness and the gift of the Holy Spirit. The letter to the Hebrews explains that Jesus is the "mediator of a better covenant" (Hebrews 8:6).
Key idea: what the earlier covenants pointed to is fulfilled in Jesus.
How the covenants fit together
The covenants are not separate, competing plans. Together they show one unfolding purpose:
| Covenant | Promise | Fulfilled in Jesus |
|---|---|---|
| Noah | The world preserved | Time for God's rescue plan |
| Abraham | Blessing for all nations | The gospel goes to every nation |
| Moses | A holy people under God's law | Jesus fulfils the law perfectly |
| David | An eternal King | Jesus, the Son of David |
| New covenant | Forgiveness and new hearts | Jesus' death, resurrection and Spirit |
Why covenants matter today
Covenants show that God is faithful — he keeps his promises across thousands of years. They also explain why Christians celebrate the Lord's Supper (Communion) as the sign of the new covenant, and why the Bible's story holds together so remarkably.
Continue with the big story of the Bible or a simple Bible timeline.