“O you who believe, do not raise your voices above the voice of the Prophet, nor speak to him loudly as you do to one another, lest your deeds be nullified while you are unaware. Those who lower their voices in the presence of the Messenger of Allah are the ones whose hearts Allah has tested for piety; for them is forgiveness and a magnificent reward. Indeed, those who call out to you from behind the private chambers—most of them lack understanding. Had they been patient until you came out to them, it would have been better for them. Allah is All-Forgiving, Most Merciful.” (al-Ḥujurāt 49:2-5)

Imam Ibn Kathīr (d. 774 AH) said: “In these verses Allah trains His believing servants in the etiquette they must observe with the Prophet ﷺ—namely, reverence, respect, veneration, and exaltation. They are not to raise their voices in his presence above his voice, and He ﷻ forbade that the Messenger be addressed by his personal name, as one addresses ordinary people, saying: ‘O Muhammad.’ Rather, he is to be called by his office of messengership and prophethood: ‘O Messenger of Allah, O Prophet of Allah.’ The Exalted said: ‘Do not treat the summons of the Messenger among yourselves like the summons of one of you to another’ (al-Nūr 24:63). Likewise, Allah Most High addresses him, ‘O Prophet,’ ‘O Messenger.’ And Allah has sent His blessings…"