Allah warns His believing servants against obeying the People of the Book, who envy the believers for the favor that Allah gave them by sending His Messenger . Similarly, Allah said,

﴿وَدَّ كَثِيرٌ مِّنْ أَهْلِ الْكِتَـبِ لَوْ يَرُدُّونَكُم مِن بَعْدِ إِيمَـنِكُمْ كُفَّارًا حَسَدًا مِّنْ عِنْدِ أَنْفُسِهِمْ﴾

(Many of the People of the Scripture (Jews and Christians) wish that they could turn you away as disbelievers after you have believed, out of their own envy) ﴿2:109﴾.

In this Ayah ﴿3:100﴾, Allah said,

﴿إِن تُطِيعُواْ فَرِيقاً مِّنَ الَّذِينَ أُوتُواْ الْكِتَـبَ يَرُدُّوكُم بَعْدَ إِيمَـنِكُمْ كَـفِرِينَ﴾

(If you obey a group of those who were given the Scripture (Jews and Christians), they would (indeed) render you disbelievers after you have believed!), then said,

﴿وَكَيْفَ تَكْفُرُونَ وَأَنْتُمْ تُتْلَى عَلَيْكُمْ ءَايَـتُ اللَّهِ وَفِيكُمْ رَسُولُهُ﴾

(And how would you disbelieve, while unto you are recited the verses of Allah, and among you is His Messenger), meaning, disbelief is far from touching you, since the Ayat of Allah are being sent down on His Messenger day and night, and he recites and conveys them to you. Similarly, Allah said,

﴿وَمَا لَكُمْ لاَ تُؤْمِنُونَ بِاللَّهِ وَالرَّسُولُ يَدْعُوكُمْ لِتُؤْمِنُواْ بِرَبِّكُمْ وَقَدْ أَخَذَ مِيثَـقَكُمْ إِن كُنتُمْ مُّؤْمِنِينَ ﴾

(And what is the matter with you that you believe not in Allah! While the Messenger invites you to believe in your Lord; and He has indeed taken your covenant, if you are real believers) ﴿57:8﴾. A Hadith states that one day, the Prophet said to his Companions,

«أَيُّ الْمُؤْمِنِينَ أَعْجَبُ إِلَيْكُمْ إِيمَانًا؟»

قالوا: الملائكة. قال:

«وَكَيْفَ لَا يُؤْمِنُونَ وَهُمْ عِنْدَ رَبِّهِم»

؟ وذكروا الأنبياء، قال:

«وَكَيْفَ لَا يُؤْمِنُونَ وَالْوَحْيُ يَنْزِلُ عَلَيْهِمْ؟»

قالوا: فنحن. قال:

«وَكَيْفَ لَا تُؤْمِنُونَ وَأَنَا بَيْنَ أَظْهُرِكُمْ؟»

قالوا: فأي الناس أعجب إيمانًا؟ قال:

«قَوْمٌ يَجِيئُونَ مِنْ بَعْدِكُمْ يَجِدُونَ صُحُفًا يُؤْمِنُونَ بِمَا فِيهَا»

("Who among the faithful believers do you consider has the most amazing faith'' They said, "The angels.'' He said, "Why would they not believe, since they are with their Lord'' They mentioned the Prophets, and the Prophet said, "Why would they not believe while the revelation is sent down to them'' They said, "Then, we are.'' He said, "Why would not you believe when I am among you'' They asked, "Who has the most amazing faith'' The Prophet said, "A people who will come after you and who will find only books that they will believe in.'')

Allah said next,

﴿وَمَن يَعْتَصِم بِاللَّهِ فَقَدْ هُدِىَ إِلَى صِرَطٍ مّسْتَقِيمٍ﴾

(And whoever depends upon Allah, then he is indeed guided to the right path) ﴿3:101﴾ for trusting and relying on Allah are the basis of achieving the right guidance and staying away from the path of wickedness. They also represent the tool to acquiring guidance and truth and achieving the righteous aims.

﴿يأَيُّهَا الَّذِينَ ءَامَنُواْ اتَّقُواْ اللَّهَ حَقَّ تُقَاتِهِ وَلاَ تَمُوتُنَّ إِلاَّ وَأَنتُم مُّسْلِمُونَ - وَاعْتَصِمُواْ بِحَبْلِ اللَّهِ جَمِيعاً وَلاَ تَفَرَّقُواْ وَاذْكُرُواْ نِعْمَةَ اللَّهِ عَلَيْكُمْ إِذْ كُنتُم أَعْدَآءً فَأَلَّفَ بَيْنَ قُلُوبِكُمْ فَأَصْبَحْتُم بِنِعْمَتِهِ إِخْوَاناً وَكُنتُمْ عَلَى شَفَا حُفْرَةٍ مِّنَ النَّارِ فَأَنقَذَكُمْ مِّنْهَا كَذلِكَ يُبَيِّنُ اللَّهُ لَكُمْ ءَايَـتِهِ لَعَلَّكُمْ تَهْتَدُونَ ﴾

(102. O you who believe! Have Taqwa of Allah as is His due, and die not except as (true) Muslims.) (103. And hold fast, all of you together, to the Rope of Allah, and be not divided among yourselves, and remember Allah's favor on you, for you were enemies of one another but He joined your hearts together, so that, by His grace, you became brethren, and you were on the brink of a pit of Fire, and He saved you from it. Thus Allah makes His Ayat clear to you, that you may be guided.)