1 Corinthians 14:29

Let the prophets speak two or three The same rule was to hold good of preaching. Those who felt that they had something to communicate must notwithstanding be governed by the desire to edify their brethren. The Church was not to be wearied out by an endless succession of discourses, good indeed in themselves, but addressed to men who were not in a condition to profit by them. It would seem that two or three short discourses, either in the vernacular, or, if there were any one present who could interpret, in some foreign tongue, took the place in Apostolic times of the modern sermon. "Let the presbyters one by one, not all together, exhort the people, and the Bishop last of all, as the commander." Apostolical Constitutions(circ. a.d. 250) ii. 57.

and let the other judge Either (1) the other prophets, or (2) the whole congregation. If the former be the correct interpretation, it refers to the gift of discerning of spirits (ch. 1 Corinthians 12:10). The latter may be defended on the ground that St Paul constantly (ch. 1 Corinthians 10:15; 1 Corinthians 11:13) appeals to the judgment of his disciples, and that he considered (ch. 1Co 12:1-3, cf. 1 John 2:20; 1 John 2:27) that allthe people of God had the faculty of discerning the spiritual value to themselves of what they heard in the congregation. For the word translated judgesee ch. 1 Corinthians 11:29; 1 Corinthians 11:31, and note.