Proverbs 23:20-21
Be not among drunkards or among gluttonous eaters of meat, for the drunkard and the glutton will come to poverty, and slumber will clothe them with rags.
This is a piece of wisdom from Solomon. It says that if you spend all of your money on wine or food and things just to please your belly, your finances are going to suffer. If it was a condemnation of overeating, and calling gluttony the sin, it would reference Sheol or some other similar notion.
Philippians 3:18-19
For many, of whom I have often told you and now tell you even with tears, walk as enemies of the cross of Christ. Their end is destruction, their god is their belly, and they glory in their shame, with minds set on earthly things.
This does not refer to eating at all. The reference to the belly means that the sinner in question values their own physical needs more than their salvation.
Deuteronomy 21:20
And they shall say to the elders of his city, This our son is stubborn and rebellious; he will not obey our voice; he is a glutton and a drunkard.
The issue is that the son is rebelling against his parents by ignoring them and instead sitting around, eating, and getting drunk—not because he had an extra helping of mashed potatoes.
1 Corinthians 3:16
Do you not know that you are God’s temple and that God’s Spirit dwells in you?
This is out of context. This passage is about divisions in the church.
This does not refer to eating at all. The reference to the belly means that the sinner in question values their own physical needs more than their salvation.
And gluttony is an instance of that.
Deuteronomy 21:20
And they shall say to the elders of his city, This our son is stubborn and rebellious; he will not obey our voice; he is a glutton and a drunkard.
The issue is that the son is rebelling against his parents by ignoring them and instead sitting around, eating, and getting drunknot because he had an extra helping of mashed potatoes.
The parents are presented as righteous in having told their son not to be gluttonous.
Proverbs 23:2
Put a knife to your throat if you are given to gluttony.