Matthew Poole and continuators on 1 Thessalonians 4:2

2 For ye know what commandements we gave you by the Lord Jesus Christ .

This explains what he said before, what they had received of him about their walking he here calls commandments, not so much his own as the Lords, as the word it self imports here used, and is exprest in the Text.

Though the Apostle had authority yet it was but derivative from Christ. And therefore not to walk as the Apostle had commanded would be disobedience to Christ himself, and he minds them of what they knew, that their knowledge might be exemplified in practise, for as Faith so Knowledge is dead which doth not influence the life, and they knew that he commanded them not in his own name but in the name of Christ.