Romans 3:23 directly restates 3:9—'all have sinned'—making the universal sinfulness explicit.

Romans 3:22 extends the logic: no distinction in sin (3:9) means no distinction in justification through faith.

Romans 3:19 immediately continues Paul's argument: the law silences everyone, holding the whole world accountable — reinforcing that all are under sin.

Romans 11:7 shows Israel failed to obtain salvation—reinforcing Paul's point in 3:9 that Jews have no inherent advantage.

Romans 6:15 rejects the inference that grace allows sin — building on the universal sinfulness declared in Romans 3:9.

Romans 2:1-16 extends the indictment to those who judge others, showing that no one escapes being under sin.

Romans 1:28-32 provides the catalogue of sins that substantiates the charge that all people are under sin.

Romans 11:32 concludes God 'consigned all to disobedience' to show mercy — echoing the universal sin statement and revealing its redemptive purpose.

Galatians 3:22 states Scripture imprisoned everything under sin, a direct parallel to the declaration in Romans 3:9.

Luke 18:9-14 contrasts self-righteous Pharisee with repentant tax collector, vividly showing that all are sinners (3:9) and need mercy.

Acts 15:9 says God cleanses hearts by faith for both Jews and Gentiles — directly addressing the same Jew/Gentile distinction Paul uses to prove all are under sin.

John 3:7 demands being 'born again' — the necessary remedy for the universal sin condition Paul describes, connecting diagnosis to solution.

Luke 1:6 describes Zechariah and Elizabeth as 'righteous before God' — in tension with Paul's claim that all are under sin, though not denying sinlessness.

Ecclesiastes 7:29 states God made man upright but they sought evil schemes — the origin of the universal sinfulness Paul declares.

Genesis 6:5 describes humanity's pervasive evil before the flood, an early illustration of universal sinfulness.

Galatians 2:15 claims 'we are Jews... not Gentile sinners' — a self-perception Paul subverts, contrasting with his assertion that all, including Jews, are under sin.

Galatians 3:10 reinforces that reliance on law brings a curse, complementing the claim that all are under sin.

Ephesians 2:3 describes all as children of wrath by nature, reinforcing that all are under sin as in Romans 3:9.

Titus 3:3 lists pre-conversion sins, confirming that all once lived under sin as stated in Romans 3:9.

1 John 5:19 says the whole world lies in the evil one's power, paralleling the universal dominion of sin in Romans 3:9.

In Galatians 6:13, Paul shows that even the circumcised fail to keep the law, illustrating the universal sin charge of Romans 3:9.

Matthew 7:11 assumes human evil nature ('you who are evil') — affirming the universal sinfulness Paul asserts, though in a different context.

Psalm 36:2 depicts the wicked's self-deception about sin, adding a psychological dimension to being under sin.

Job 15:16 describes man as abominable and corrupt, a poetic reinforcement that all are under sin.