Romans 14:14 extends the same principle of personal conviction from days to food—a parallel teaching on not judging based on conscience.

Romans 14:23 warns that acting without conviction leads to sin—adding a serious consequence to the call for being fully convinced in v5.

1 Corinthians 8:7 describes a weak conscience about food offered to idols—parallel to the weak conscience regarding days in Romans 14:5.

1 Corinthians 8:11 warns that a weak brother can be destroyed by your freedom—emphasizing responsibility to respect another's conviction, as in Romans 14:5.

Galatians 4:10 lists the same observance of special days, but Paul condemns it there as a return to legalism—contrasting the freedom allowed in Romans 14:5.

Colossians 2:16 instructs not to let others judge you about festivals and Sabbaths—mirroring the principle of not judging fellow believers over days.

Colossians 2:17 explains that such observances are only shadows; Christ is the substance—providing the theological reason for freedom in Romans 14:5.