Surah 49. Al-Hujurat, Ayah 2

This has both a literal and a figurative meaning: literal in the case of the Prophet's Companions, and figurative for them as well as for believers of later times - implying that one's personal opinions and predilections must not be allowed to overrule the clear-cut legal ordinances and/or moral stipulations promulgated by the Prophet (cf. 4:65 and the corresponding note [84]).

I.e., address him, or (in later times) speak of him, with unbecoming familiarity.

 There is also a different interpretation: “… nor call him ˹by his name˺ as you call one another.” In other words, Do not say, ‘O Muḥammad.’ Rather, say, ‘O Prophet.’

It is bad manners to talk loudly before your Leader. Some ill-mannered people so raise their voices as to drown the voice of their Leader, in conversation or in Council.

Such rudeness may even destroy the value of such services as they may otherwise have been able to render, and all this without their even realising the harm they were doing to the Cause.