Matthew Poole and continuators on 1 Corinthians 14:27

27 If any man speak in an unknown tongue, let it be by two, or at the most by three, and that by course, and let one interpret .

Concerning the use of their gift of Tongues, he directeth three things: 1. That every one that had it, should not be ambitious to shew it at all times, but two or three at most at a time. 2. That they should do it by course, not together, confusedly. 3. Not without one to interpret, that people might understand. For though these were extraordinary gifts, flowing from a more than ordinary influence of the Spirit of God; yet they were abiding habits, not coming upon them at some certain times, by an impulse; for then they would not have been under humane Government, as it is apparent this gift of tongues was, else Paul could not have so governed himself in the use of it, as he lets us know he did, v. 19.