ROM 14:6

6 As for those who believe that they should worship on [a certain] day [of the week], it is to [honor] the Lord [that they worship on that day]. And as for those who [think that it is all right to] eat [all kinds of food], it is to [honor] the Lord [that they eat those foods], as is clear from their thanking God [for the food that they eat]. As for those who abstain from [eating certain kinds of] food, it is to [honor] the Lord that they do not eat [those foods], and they also thank God [for the food that they do eat. So doing either of those things is not wrong in itself].