John Trapp on 1 Corinthians 14:27

Verſe 27. Or at the moſt by three] Leſt the hearers be tired out. Our infirmity will not ſuffer any long intention, either of body or minde. Long ſervices can hardly maintain their vigour, as in tall bodies the ſpirits are diffuſed. Eraſmus hath obſerved that Origen never preached above an hour, oft but half an hour: Conſultiùs judicabat crebrò docere, quam diu, ſaith he. He held it better to preach oft, then long.Eraſ praefat. ad Orig. opera.