﴿ مَّن يُطِعِ ٱلرَّسُولَ فَقَدْ أَطَاعَ ٱللَّهَ ۖ وَمَن تَوَلَّىٰ فَمَآ أَرْسَلْنَٰكَ عَلَيْهِمْ حَفِيظًۭا ﴾

“Whoever pays heed unto the Apostle pays heed unto God thereby; and as for those who turn away - We have not sent thee to be their keeper.”

Please check ayah 4:81 for complete tafsir.