Romans 14:3

14:3 The one who eats everything must not despise the one who does not, and the one who abstains must not judge the one who eats everything, for God has accepted him.

Romans 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.

Romans 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.

Romans 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.

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¹ sn Here clean refers to food being ceremonially clean.