بسم الله الرحمن الرحيم
Shaikh Salih al Fawzaan حفظه الله comments regarding His Statement (The Most High):
مَا كَانَ لِبَشَرٍ أَن يُؤۡتِيَهُ ٱللَّهُ ٱلۡكِتَٰبَ وَٱلۡحُكۡمَ وَٱلنُّبُوَّةَ ثُمَّ يَقُولَ لِلنَّاسِ كُونُواْ عِبَادٗا لِّي مِن دُونِ ٱللَّهِ وَلَٰكِن كُونُواْ رَبَّٰنِيِّـۧنَ بِمَا كُنتُمۡ تُعَلِّمُونَ ٱلۡكِتَٰبَ وَبِمَا كُنتُمۡ تَدۡرُسُونَ
It is not (possible) for any human being to whom Allah has given the Book and Al-Hukma (the knowledge and understanding of the laws of religion, etc.) and Prophethood to say to the people: “Be my worshippers rather than Allah’s.” On the contrary (he would say): “Be you Rabbaaniyun (learned men of religion who practise what they know and also preach others), because you are teaching the Book, and you are studying it.” (Surah Aali-Imraan:79)
What is understood from this verse is that it is not suitable with Allah that he would choose for his Messenger-ship and Prophet-hood someone who calls the people to shirk; just as the Jews and Christians would say that the Messengers ordered the worship of the Prophets, Rabbis (1) and Monks (2). Allah (The Most High) said:
ٱتَّخَذُوٓاْ أَحۡبَارَهُمۡ وَرُهۡبَٰنَهُمۡ أَرۡبَابٗا مِّن دُونِ ٱللَّهِ وَٱلۡمَسِيحَ ٱبۡنَ مَرۡيَمَ وَمَآ أُمِرُوٓاْ إِلَّا لِيَعۡبُدُوٓاْ إِلَٰهٗا وَٰحِدٗاۖ لَّآ إِلَٰهَ إِلَّا هُوَۚ سُبۡحَٰنَهُۥ عَمَّا يُشۡرِكُونَ
They (Jews and Christians) took their rabbis and their monks to be their lords besides Allah (by obeying them in things which they made lawful or unlawful according to their own desires without being ordered by Allah), and (they also took as their Lord) Messiah, son of Maryam (Mary), while they (Jews and Christians) were commanded [in the Taurat (Torah) and the Injeel (Gospel)) to worship none but One Ilah (God – Allah) La ilaha illa Huwa (none has the right to be worshipped but He). Praise and glory be to Him, (far above is He) from having the partners they associate (with Him).” (Surah At-Tawbah:31)
So they lied upon the Prophets of Allah, ascribing to them that they would order them to take partners in worship and to take them as intercessors with Allah and to take them as intermediaries with Allah, this is how they lie!
Min Ahkhaam al-Qur’aan by Shaikh Salih al Fawzaan حفظه الله vol.1 pg. 24-25.
1) Rabbis are the scholars amongst the Jews
2) Monks are the worshippers amongst the Christians