Treasury of Scripture Knowledge
The person who observes a certain day [as specially sacred], does so out of devotion to the Lord. And the person who eats [only certain foods] does so out of devotion to the Lord, for he is thankful to God [for what he eats]. And the person who refuses to eat [certain foods], does so out of devotion to the Lord and he is thankful to God [for what he does eat].
1 Timothy 4:3
They forbid people to get married and require them to avoid [eating] certain foods, which God created to be received with thanksgiving by those who believe and [fully] know the truth.
Do not allow what you consider good to be spoken against [i.e., the exercise of a liberty by the strong to eat anything must not become the occasion of criticism by the weak].