Al-Hujurat 49:2

Ya ayyuha allatheena amanoola tarfaAAoo aswatakum fawqa sawti annabiyyiwala tajharoo lahu bilqawli kajahri baAAdikumlibaAAdin an tahbata aAAmalukumwaantum la tashAAuroon

O you who have believed, do not raise your voices above the voice of the Prophet or be loud to him in speech like the loudness of some of you to others, lest your deeds become worthless while you perceive not.

O you who believe, do not raise your voices above the voice of the Prophet, and be not loud when speaking to him, as you are loud when speaking to one another, lest your good deeds should become void while you are not aware.