بسم الله الرحمن الرحيم

Shaikh Salih al Fawzaan حفظه الله comments regarding His Statement (The Most High):

وَإِذۡ أَخَذَ ٱللَّهُ مِيثَٰقَ ٱلنَّبِيِّـۧنَ لَمَآ ءَاتَيۡتُكُم مِّن كِتَٰبٖ وَحِكۡمَةٖ ثُمَّ جَآءَكُمۡ رَسُولٞ مُّصَدِّقٞ لِّمَا مَعَكُمۡ لَتُؤۡمِنُنَّ بِهِۦ وَلَتَنصُرُنَّهُۥۚ قَالَ ءَأَقۡرَرۡتُمۡ وَأَخَذۡتُمۡ عَلَىٰ ذَٰلِكُمۡ إِصۡرِيۖ قَالُوٓاْ أَقۡرَرۡنَاۚ قَالَ فَٱشۡهَدُواْ وَأَنَا۠ مَعَكُم مِّنَ ٱلشَّٰهِدِينَ

And (remember) when Allah took the Covenant of the Prophets, saying: “Take whatever I gave you from the Book and Hikmah (understanding of the Laws of Allah, etc.), and afterwards there will come to you a Messenger (Muhammad SAW) confirming what is with you; you must, then, believe in him and help him.” Allah said: “Do you agree (to it) and will you take up My Covenant (which I conclude with you)?” They said: “We agree.” He said: “Then bear witness; and I am with you among the witnesses (for this).” Surah Aal-E-Imran, Ayah 81

ًWhat can be taken from this verse is that it is an obligation on everyone to follow the Prophet  صلى الله عليه وسلم including the Jews and Christians, like Allah said:

“قُلۡ يَٰٓأَيُّهَا ٱلنَّاسُ إِنِّي رَسُولُ ٱللَّهِ إِلَيۡكُمۡ جَمِيعًا ٱلَّذِي لَهُۥ مُلۡكُ ٱلسَّمَٰوَٰتِ وَٱلۡأَرۡضِۖ لَآ إِلَٰهَ إِلَّا هُوَ يُحۡيِۦ وَيُمِيتُۖ فَـَٔامِنُواْ بِٱللَّهِ وَرَسُولِهِ ٱلنَّبِيِّ ٱلۡأُمِّيِّ ٱلَّذِي يُؤۡمِنُ بِٱللَّهِ وَكَلِمَٰتِهِۦ وَٱتَّبِعُوهُ لَعَلَّكُمۡ تَهۡتَدُونَ”

Say (O Muhammad SAW): “O mankind! Verily, I am sent to you all as the Messenger of Allah – to Whom belongs the dominion of the heavens and the earth. La ilaha illa Huwa (none has the right to be worshipped but He); It is He Who gives life and causes death. So believe in Allah and His Messenger (Muhammad صلى الله عليه وسلم), the Prophet who can neither read nor write (i.e. Muhammad صلى الله عليه وسلم) who believes in Allah and His Words [(this Quran), the Taurat (Torah) and the Injeel (Gospel) and also Allah’s Word: “Be!” – and he was, i.e. ‘Iesa (Jesus) son of Maryam (Mary)], and follow him so that you may be guided.” Surah Al-A’raf, Ayah 158

“ٱلَّذِينَ يَتَّبِعُونَ ٱلرَّسُولَ ٱلنَّبِيَّ ٱلۡأُمِّيَّ ٱلَّذِي يَجِدُونَهُۥ مَكۡتُوبًا عِندَهُمۡ فِي ٱلتَّوۡرَىٰةِ وَٱلۡإِنجِيلِ يَأۡمُرُهُم بِٱلۡمَعۡرُوفِ وَيَنۡهَىٰهُمۡ عَنِ ٱلۡمُنكَرِ وَيُحِلُّ لَهُمُ ٱلطَّيِّبَٰتِ وَيُحَرِّمُ عَلَيۡهِمُ ٱلۡخَبَٰٓئِثَ”

“Those who follow the Messenger, the Prophet who can neither read nor write (i.e. Muhammad صلى الله عليه وسلم) whom they find written with them in the Taurat (Torah) (Deut, xviii, 15) and the Injeel (Gospel) (John xiv, 16), – he commands them for Al-Ma’ruf (i.e. Islamic Monotheism and all that Islam has ordained); and forbids them from Al-Munkar (i.e. disbelief, polytheism of all kinds, and all that Islam has forbidden); he allows them as lawful At-Taiyibat [(i.e. all good and lawful) as regards things, deeds, beliefs, persons, foods, etc.], and prohibits them as unlawful Al-Khaba’ith (i.e. all evil and unlawful as regards things, deeds, beliefs).” Surah Al-A’raf, Ayah 157

So whoever does not believe in the Muhammad صلى الله عليه وسلم and does not follow him then he is indeed a disbeliever, even if he claims to follow the religion of Moses just like the Jews claim, or even if he claims to follow the religion of Jesus just like the Christians claim for Allah ordered them all to follow Muhammad صلى الله عليه وسلم  the Messengers  were commanded with following him also because Allah took the covenant from them that when Muhammad صلى الله عليه وسلم was sent he would surely be believed in and helped.

Source: Min Ahkhaam Al-Qur’aan by Shaikh Salih al Fawzaan حفظه الله  vol.1 pgs. 42 – 43