As I besought thee to abide still at Ephesus, when I went into Macedonia, that thou mightest charge some that they teach no other doctrine, I besought thee - The apostle had seen that a bad seed had been sown in the Church; and, as he was obliged to go then into Macedonia, he wished Timothy, on whose prudence, piety, and soundness in the faith he could depend, to stay behind and prevent the spreading of a doctrine that would have been pernicious to the people's souls. I have already supposed that this epistle was written after Paul had been delivered from his first imprisonment at Rome, about the end of the year 64, or the beginning of 65. See the preface. When, therefore, the apostle came from Rome into Asia, he no doubt visited Ephesus, where, ten years before, he had planted a Christian Church, and, as he had not time to tarry then, he left Timothy to correct abuses.
That thou mightest charge some - He does not name any persons; the Judaizing teachers are generally supposed to be those intended; and the term τισι, some, certain persons, which he uses, is expressive of high disapprobation, and at the same time of delicacy: they were not apostles, nor apostolic men; but they were undoubtedly members of the Church at Ephesus, and might yet be reclaimed.