1 Tim 3:1-7
"The saying is trustworthy: If anyone aspires to the office of overseer, he desires a noble task. Therefore an overseer must be above reproach, the husband of one wife, sober-minded, self-controlled, respectable, hospitable, able to teach; not a drunkard, not violent but gentle, not quarrelsome, not a lover of money. He must manage his own household well..."
The 15 qualifications of the bishop (episkopos): most are character qualities, not technical skills. 'Husband of one wife' — debated: prohibition of polygamy, or of remarriage after divorce/widowhood? The context favors marital faithfulness. 'Able to teach' (didaktikos) is the only specific ministerial qualification.