Romans 14:6-8

He who observes the day, observes it for the Lord. He who eats, eats for the Lord, since he gives thanks to God; while he who abstains, abstains for the Lord and gives thanks to God. None of us lives for himself [for his own benefit, but for the Lord], and none of us dies for himself [but for the Lord]. If we live, we live for the Lord, and if we die, we die for the Lord. So then, whether we live or die, we are the Lord’s.