Quran 49:2 — The Walls (Al-Hujurat)

O you who believe, do not raise your voices above the voice of the prophet,* nor shall you shout at him as you shout at each other, lest your works become nullified while you do not perceive.

[49:1] O you who believe, do not place your opinion above that of GOD and His messenger. You shall reverence GOD. GOD is Hearer, Omniscient.

[49:3] Surely, those who lower their voices at the messenger of GOD are the ones whose hearts are prepared by GOD to become righteous.* They have deserved forgiveness and a great recompense.