Romans 14:6-8 NASB

"He who observes the day, observes it for the Lord, and he who eats, does so for the Lord, for he gives thanks to God; and he who eats not, for the Lord he does not eat, and gives thanks to God. For not one of us lives for himself, and not one dies for himself; for it we live, we live for the Lord, or if we die, we die for the Lord; therefore whether we live or die, we are the Lord's."