The following comes from Section 3 of Luther’s Small Catechism: Table of Duties
To Bishops, Pastors, and Preachers
The overseer must be above reproach, the husband of but one wife, temperate, self-controlled, respectable, hospitable, able to teach, not given to drunkenness, not violent but gentle, not quarrelsome, not a lover of money. He must manage his own family well and see that his children obey him with proper respect. — 1 Tim. 3:2-4
He must not be a recent convert, or he may become conceited and fall under the same judgment as the devil. — 1 Tim. 3:6
He must hold firmly to the trustworthy message as it has been taught, so that he can encourage others by sound doctrine and refute those who oppose it. — Titus 1:9