Suunat of Messenger, The Duty of the Messenger is to God Alone
3:19 Remember that the System of Life approved by God is only Islam (Submission). Those who were given the scripture dissented from it through mutual rivalry and envy, after knowledge had come to them. If anyone rejects God's revelations, then God is Swift in reckoning.
[‘Ind-Allah = In the Sight of God = Approved by God = Before God. Deen = The System of Life = The Divinely Prescribed Way of Life = In a loose sense, ‘religion’, a ritualistic Way of Life = ‘Religion’ even with a capital R may scarcely come close in meaning to the term Deen. Al-Islam = Submission to God = Submission to Divine will = Universal Peace achieved by submission to the One True God. 6:87] 3:20 If they argue with you (O Messenger), tell them, “I have submitted to God; I and those who follow me.” Say to the People of the Scripture, and to those who have no Scripture, “Would you submit (to God)?” If they submit, then they have been guided but if they turn away, then your duty is only to convey the message. God is Seer of His servants. 3:21 Those who reject the messages of God, and wrongfully kill (degrade) the Prophets or their Mission by mixing truth with falsehood, and kill or harm the advocates of justice in the society; promise them grievous retribution.
No Messenger Says To Follow Their Sunnah Or Hadith, or Creed:
3:79 Never would a human being whom God has blessed with the scripture, wisdom and even prophetic office, thereafter say to people, “Be servants of me instead of God.” Rather, he would say, “Become true devotees of the Lord according to the scripture you teach and explain.”
The Messenger Was to Convey The Quran, Not His Hadith or creed of his or anyone else:
5:67 O Messenger! Convey all that your Lord has revealed to you. Unless you do it, you will not have conveyed His messages at all. God will protect you from the people. God does not guide those in stubborn denial.