What is the context?
Abraham moves to Gerar and again identifies Sarah as his sister, repeating the deception seen in Egypt. Abimelech takes her, but God warns him in a dream that she is married. The account explicitly says he has not gone near her, and God explains that He has kept him from touching her. Sarah is protected before Abraham repairs the situation.
Abimelech confronts Abraham, who explains his fear that people without the fear of God would kill him for his wife. He also says that Sarah is his half-sister and describes their agreement to present him as her brother wherever they travel. That partial truth has concealed the fact that matters here: she is his wife. Abimelech returns her, gives gifts, and publicly clears her.
God calls Abraham a prophet, נָבִיא, nāḇîʾ (nah-VEE), a word Brown–Driver–Briggs explains as spokesman or prophet, expressly including Genesis 20:7. In this scene his role includes praying for Abimelech. The man whose conduct has caused harm is still called to serve God by seeking another household's restoration. Abraham prays, and God heals the household so that its women can again bear children.
How is this passage commonly understood?
A common Christian reading recognizes both Abraham's deceptive conduct and God's intervention to protect Sarah and restore Abimelech's household. Wesley's notes on Genesis 20:6, 9–11 emphasize God's restraint of wrongdoing and challenge Abraham's assumption that no one there fears God.
Where does this fit in God's plan?
God's protection of Sarah preserves the family through whom He has promised the son. The next chapter records Isaac's birth; Hebrews 11:11–12 later remembers that birth in relation to God's faithfulness. The future of the promise continues through God's care even when Abraham's fearful choices endanger the people involved.
There is also a wider lesson about prayer for others. James 5:16–18 joins confession, prayer, and healing, using a human prophet as an example. Abraham's role here is not permission to overlook the wrong he has done. It shows a servant being required to seek the good of people his own conduct has harmed.
What is our position?
We don't have a position on this passage yet. When our study reaches a conclusion the text supports, it will appear here.