Romans 14:5-10

[For] one person considers one day more important than another, while another person considers all days alike. Let everyone be fully persuaded in his own mind. Whoever observes the day, observes it for the Lord. Also whoever eats, eats for the Lord, since he gives thanks to God; while whoever abstains, abstains for the Lord and gives thanks to God. None of us lives for oneself, and no one dies for oneself. For 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. For this is why Christ died and came to life, that he might be Lord of both the dead and the living. Why then do you judge your brother? Or you, why do you look down on your brother? For we shall all stand before the judgment seat of God