In 1 Corinthians 5:5, Paul exercises the severe discipline of handing a sinner to Satan — an example of the 'rod' he threatens in 4:21.

In 2 Corinthians 10:1, Paul appeals by 'meekness and gentleness of Christ' — the very spirit of gentleness he offers as the alternative to the rod.

In 2 Corinthians 10:2, Paul hopes not to use boldness against accusers — echoing the choice between a rod and gentleness from 4:21.

In 2 Corinthians 10:6, Paul’s readiness to punish disobedience echoes the 'rod' — he is prepared to act when obedience is complete.

In 2 Corinthians 10:8, Paul clarifies that his authority (the 'rod') is given for building up, not destruction — the same discipline is constructive.

In 2 Corinthians 12:20, Paul lists sins he fears to find — the very behaviors that would force him to come with a 'rod' instead of gentleness.

In 2 Corinthians 12:21, Paul fears unrepentant sin will bring mourning — the 'rod' would be the appropriate response to such unrepentance.

In 2 Corinthians 13:2, Paul warns he 'will not spare' — the 'rod' is explicitly the discipline he will administer if needed.

In 1 Thessalonians 2:7, Paul describes being gentle like a nursing mother — the same gentle approach he offers in contrast to the rod.

In Proverbs 26:3, 'a rod for the back of fools' parallels Paul's 'rod' — both use discipline as the appropriate response to foolishness.

In 2 Corinthians 1:23, Paul says he delayed visiting to spare them—choosing gentleness over using the rod.

In 2 Corinthians 2:1, Paul resolved not to make another painful visit—avoiding the rod he threatened.

In 2 Corinthians 2:3, Paul wrote to avoid being grieved, showing his desire to come with love rather than the rod.

In 2 Corinthians 13:10, Paul writes to avoid harshness when he comes, directly echoing the rod vs gentleness choice.

In Galatians 6:1, Paul instructs restoring sinners with gentleness—the same spirit of gentleness he offers in 1 Cor 4:21.

In James 3:17, heavenly wisdom is described as 'gentle' — the same quality Paul offers as the alternative to the rod, though in a broader moral context.