Do not make [your] calling of the Messenger among yourselves as the call of one of you to another. Already Allāh knows those of you who slip away, concealed by others. So let those beware who dissent from his [i.e., the Prophet's] order,1 lest fitnah2 strike them or a painful punishment.
O believers! Honour the Messenger of Allah; when you call out to him, do not call him by name, e.g. “O Muhammad!”, or the name of his father, e.g. “O the son of Abdullah!”, like you call one another. Rather, say: “O Messenger of Allah, O Prophet of Allah!” And when he summons you for a general matter, do not treat his summoning like that of each other in petty issues; rather, hasten to answering his summon. Verily, Allah knows of those of you who leave covertly without seeking permission, so those who go against the command of the Messenger of Allah peace be upon him should fear that Allah can afflict them with trials and afflictions, or with a painful punishment they cannot bear.