Therefore she said to Abraham, “Cast out this handmaid and her son! For the son of this handmaid will not be heir with my son, Isaac.”
⛓ Read Genesis 21 forward — the whole chapter and its afterlife →Where this passage surfaces again, sorted by the strength of the link. Each kind of reuse — formal quotation, deliberate allusion, faint echo, figural pattern — carries its own mark. Follow any reference to read it in place.
Quotation1
A formal citation — high verbal volume, often introduced by a saying-formula.
V.30 quotes Gen 21:10 (Sarah's words): 'Throw out the handmaid and her son, for the son of the handmaid will not inherit with the son of the free woman.' High verbal volume; the inheritance/exclusion ruling is Paul's clinching scriptural warrant, marked 'what does the Scripture say.'
High confidenceAllusion1
A deliberate verbal borrowing without a citation formula.
'A slave does not remain in the house forever; the son remains forever' alludes to Sarah's demand that the slave woman's son not inherit with the free son, the Isaac/Ishmael household division. High Coherence; the slave-vs-son contrast that grounds Jesus' freedom argument is drawn from this Genesis scene of casting out the bondservant.
High confidence