Roma 14:14

14:14 I know and am convinced in the Lord Jesus that there is nothing unclean in itself; still, it is unclean to the one who considers it unclean.

Roma 14:17

14:17 For the kingdom of God does not consist of food and drink, but righteousness, peace, and joy in the Holy Spirit.

Roma 14:20

14:20 Do not destroy the work of God for the sake of food. For although all things are clean, ¹  it is wrong to cause anyone to stumble by what you eat.

[14:20]  ¹ sn Here clean refers to food being ceremonially clean.