Romans 14:5-6

American Standard Version

⁵ One man esteemeth one day above another: another esteemeth every day alike. Let each man be fully assured in his own mind. ⁶ He that regardeth the day, regardeth it unto the Lord: and he that eateth, eateth unto the Lord, for he giveth God thanks; and he that eateth not, unto the Lord he eateth not, and giveth God thanks.