1 Corinthians 1:16 - Coke's Commentary on the Holy Bible

Besides, I know not, &c.— This expression of uncertainty as to such a fact, is by no means inconsistent with that inspiration wherewith the Apostles of our Lord were endued; which certainly was neither continual, nor reached to every accident and circumstance in life. The office of baptism was probably in general assigned to inferiors, as requiring no extraordinary abilities. The proper office of an apostle was not so much to perform the ceremony of baptism with his own hands, as to attend constantly to the work of preaching the Gospel. See the next verse, and Burnet on the 27th Article.