Genesis 21:10

My Notes

What Does Genesis 21:10 Mean?

"Wherefore she said unto Abraham, Cast out this bondwoman and her son: for the son of this bondwoman shall not be heir with my son, even with Isaac." Sarah demands the EXPULSION of Hagar and Ishmael: cast them OUT. The bondwoman's son will NOT inherit alongside Isaac. The demand is HARSH — expelling a mother and child into the desert. The demand is also THEOLOGICALLY significant — Paul will quote this verse in Galatians 4:30 as an allegory of the relationship between law and grace. The casting out of the bondwoman's son represents the exclusion of law-based inheritance from grace-based inheritance.

The phrase "cast out this bondwoman and her son" (garesh ha'amah hazzot ve'et benah — drive out this slave-woman and her son) is a DEMAND for permanent removal: garesh means to drive out, expel, divorce, banish. Not temporary separation. PERMANENT expulsion. The demand is that Hagar and Ishmael leave Abraham's household FOREVER. The casting out is the severing of the relationship.

The "shall not be heir with my son, even with Isaac" (ki lo yirash ben ha'amah hazzot im beni im Yitzchaq — for the son of this slave-woman shall not inherit with my son, with Isaac) makes the INHERITANCE the issue: the conflict isn't personal (though it IS personal). It's about INHERITANCE — who receives the promise, who inherits the covenant, who carries the blessing forward. Sarah's demand is: Ishmael will NOT share Isaac's inheritance. The two lines must SEPARATE. The heir of the flesh and the heir of the promise cannot coexist in the same household.

Reflection Questions

• 1.What flesh-effort is competing with the promise-inheritance in your life?
• 2.What does the two sons NOT coexisting teach about law and grace being incompatible inheritances?
• 3.How does Paul's allegorical use of this passage transform a family drama into gospel theology?
• 4.What needs to be 'cast out' so the child of promise can inherit freely?

Devotional

CAST HER OUT. Her AND her son. The bondwoman's son will NOT inherit with MY son Isaac. Sarah's demand is harsh, protective, and — according to Paul in Galatians 4:30 — theologically significant. The separation of the two sons represents the separation of two inheritances: flesh and promise, law and grace, human effort and divine gift.

The 'cast out' (garesh) is PERMANENT expulsion: not a temporary separation or a cooling-off period. BANISHMENT — permanent, complete, irreversible removal from the household. The demand is severe because the stakes are severe: the inheritance of the covenant is at issue. Sarah sees what coexistence would produce: confusion about who is the heir. The casting out resolves the confusion.

The 'shall not be heir with my son' makes INHERITANCE the battlefield: the conflict between Sarah and Hagar has always been about WHICH SON carries the promise forward. Ishmael was born first. Isaac was born of promise. The firstborn-rights and the promise-rights compete. Sarah's demand resolves the competition: Ishmael will NOT inherit alongside Isaac. The two lines SEPARATE. The inheritance goes to ONE.

Paul's USE of this passage (Galatians 4:30) transforms the domestic drama into THEOLOGICAL allegory: Hagar represents the covenant of LAW (Sinai, bondage, the flesh). Sarah represents the covenant of PROMISE (freedom, grace, the Spirit). The casting out of the bondwoman's son represents the EXCLUSION of law-based righteousness from grace-based inheritance. The two cannot COEXIST. The inheritance belongs to the child of PROMISE, not the child of the flesh.

What 'bondwoman's son' — what flesh-effort, what law-achievement — is competing with the promise-inheritance in your life?

Commentary

Trusted original commentary from respected historical Bible scholars and theologians.

Cross References

Related passages throughout Scripture