An-Nur 24:63

La tajAAaloo duAAaa arrasoolibaynakum kaduAAa-i baAAdikum baAAdan qadyaAAlamu Allahu allatheena yatasallaloona minkumliwathan falyahthari allatheena yukhalifoonaAAan amrihi an tuseebahum fitnatun aw yuseebahumAAathabun aleem

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, lest fitnah strike them or a painful punishment.

Do not take the call of the messenger among you as a call of one of you to another. Allah definitely knows those of you who sneak out hiding themselves under the cover of others. So, those who violate his (messenger’s) order must beware, lest they are visited by a trial or they are visited by a painful punishment.