Romans 14:3 Let not him who eats certain food look down upon him who abstains from it, nor him who abstains from it find fault with him who eats it; for God has received both of them. (WEY RSV)
Romans 14:6 He who observes the day, observes it to the Lord; and he who does not observe the day, to the Lord he does not observe it. He who eats, eats to the Lord, for he gives God thanks. He who doesn't eat, to the Lord he doesn't eat, and gives God thanks. (See RSV NIV)