Matthew 15:17 is the parallel account of this same saying about food entering the stomach and being expelled.

Colossians 2:21 quotes 'do not taste' restrictions — the very human traditions Jesus' declaration of all foods clean overturns.

Colossians 2:22 refers to things that perish with use — aligning with Jesus' point about food being expelled and not defiling.

1 Corinthians 6:13 says food and stomach are temporary — supporting the idea that what goes in doesn't defile, though Paul applies it to sexual ethics.