1 Corinthians 14:27-30

If anyone speaks in a tongue, it should be limited to two or at the most three, and each one speaking in turn, and one must interpret [what is said]. But if there is no one to interpret, the one [who wishes to speak in a tongue] must keep silent in church; let him speak to himself and to God. Let two or three prophets speak [as inspired by the Holy Spirit], while the rest pay attention and weigh carefully what is said. But if an inspired revelation is made to another who is seated, then the first one must be silent.