The reading is from St. Paul's Letter to the Romans 13:11-14; 14:1-4

Brethren, salvation is nearer to us now than when we first believed; the night is far gone, the day is at hand. Let us then cast off the works of darkness and put on the armor of light; let us conduct ourselves becomingly as in the day, not in reveling and drunkenness, not in debauchery and licentiousness, not in quarreling and jealousy. But put on the Lord Jesus Christ, and make no provision for the flesh, to gratify its desires.

As for the man who is weak in faith, welcome him, but not for disputes over opinions. One believes he may eat anything, while the weak man eats only vegetables. Let not him who eats despise him who abstains, and let not him who abstains pass judgment on him who eats; for God has welcomed him. Who are you to pass judgment on the servant of another? It is before his own master that he stands or falls. And he will be upheld, for God is able to make him stand.