Allah said to His Prophet,

﴿وَلاَ يَحْزُنكَ الَّذِينَ يُسَـرِعُونَ فِى الْكُفْرِ﴾

(And let not those grieve you who rush with haste to disbelieve) ﴿3:176﴾.

Because the Prophet was eager for people's benefit, he would become sad when the disbelievers would resort to defiance, rebellion and stubbornness. Allah said, `Do not be saddened by this behavior,'

﴿إِنَّهُمْ لَن يَضُرُّواْ اللَّهَ شَيْئاً يُرِيدُ اللَّهُ أَلاَّ يَجْعَلَ لَهُمْ حَظّاً فِى الاٌّخِرَةِ﴾

(verily, not the least harm will they do to Allah. It is Allah's will to give them no portion in the Hereafter.) for He decided with His power and wisdom that they shall not acquire any share in the Hereafter,

﴿وَلَهُمْ عَذَابٌ عظِيمٌ﴾

(For them there is a great torment.)

Allah said about the disbelievers,

﴿إِنَّ الَّذِينَ اشْتَرَوُاْ الْكُفْرَ بِالإِيمَـنِ﴾

(Verily, those who purchase disbelief at the price of faith,) by exchanging disbelief for faith,

﴿لَن يَضُرُّواْ اللَّهَ شَيْئاً﴾

(not the least harm will they do to Allah.) Rather, they will only harm themselves,

﴿وَلَهُمْ عَذَابٌ أَلِيمٌ﴾

(For them, there is a painful torment.)

Allah said next,

﴿وَلاَ يَحْسَبَنَّ الَّذِينَ كَفَرُواْ أَنَّمَا نُمْلِى لَهُمْ خَيْرٌ لاًّنفُسِهِمْ إِنَّمَا نُمْلِى لَهُمْ لِيَزْدَادُواْ إِثْمَاً وَلَهْمُ عَذَابٌ مُّهِينٌ ﴾

(And let not the disbelievers think that Our postponing their punishment is good for them. We postpone the punishment only so that they may increase in sinfulness. And for them is a disgraceful torment) ﴿3:178﴾.

This statement is similar to Allah's other statements,

﴿أَيَحْسَبُونَ أَنَّمَا نُمِدُّهُمْ بِهِ مِن مَّالٍ وَبَنِينَ - نُسَارِعُ لَهُمْ فِى الْخَيْرَتِ بَل لاَّ يَشْعُرُونَ ﴾

(Do they think that because We have given them abundant wealth and children, ﴿that﴾ We hasten unto them with good things. Nay, but they perceive not.) ﴿23:55,56﴾ and

﴿فَذَرْنِى وَمَن يُكَذِّبُ بِهَـذَا الْحَدِيثِ سَنَسْتَدْرِجُهُمْ مِّنْ حَيْثُ لاَ يَعْلَمُونَ ﴾

(Then leave Me Alone with such as belie this Qur'an. We shall punish them gradually from directions they perceive not.) ﴿68:44﴾, and,

﴿وَلاَ تُعْجِبْكَ أَمْوَلُهُمْ وَأَوْلَـدُهُمْ إِنَّمَا يُرِيدُ اللَّهُ أَن يُعَذِّبَهُمْ بِهَا فِى الدُّنْيَا وَتَزْهَقَ أَنفُسُهُمْ وَهُمْ كَـفِرُونَ ﴾

(And let not their wealth or their children amaze you. Allah's plan is to punish them with these things in this world, and that their souls shall depart (die) while they are disbelievers) ﴿9:85﴾.

Allah then said,

﴿مَّا كَانَ اللَّهُ لِيَذَرَ الْمُؤْمِنِينَ عَلَى مَآ أَنتُمْ عَلَيْهِ حَتَّى يَمِيزَ الْخَبِيثَ مِنَ الطَّيِّبِ﴾

(Allah will not leave the believers in the state in which you are now, until He distinguishes the wicked from the good.) ﴿3:179﴾, meaning, He allows a calamity to happen, and during this calamity His friend becomes known and His enemy exposed, the patient believer recognized and the sinful hypocrite revealed. This Ayah refers to Uhud, since Allah tested the believers in that battle, thus making known the faith, endurance, patience, firmness and obedience to Allah and His Messenger that the believers had. Allah exposed the hypocrites in their defiance, reverting from Jihad, and the treachery they committed against Allah and His Messenger . This is why Allah said,

﴿مَّا كَانَ اللَّهُ لِيَذَرَ الْمُؤْمِنِينَ عَلَى مَآ أَنتُمْ عَلَيْهِ حَتَّى يَمِيزَ الْخَبِيثَ مِنَ الطَّيِّبِ﴾

(Allah will not leave the believers in the state in which you are now, until He distinguishes the wicked from the good.)

Mujahid commented, "He distinguished between them during the day of Uhud.'' Qatadah said, "He distinguished between them in Jihad and Hijrah.'' Allah said next,

﴿وَمَا كَانَ اللَّهُ لِيُطْلِعَكُمْ عَلَى الْغَيْبِ﴾

(Nor will Allah disclose to you the secrets of the Unseen.) meaning, you do not have access to Allah's knowledge of His creation so that you can distinguish between the believer and the hypocrite, except by the signs of each type that Allah uncovers. Allah's statement,

﴿وَلَكِنَّ اللَّهَ يَجْتَبِى مِن رُّسُلِهِ مَن يَشَآءُ﴾

(but Allah chooses of His Messengers whom He wills.) is similar to another Ayah,

﴿عَـلِمُ الْغَيْبِ فَلاَ يُظْهِرُ عَلَى غَيْبِهِ أَحَداً - إِلاَّ مَنِ ارْتَضَى مِن رَّسُولٍ فَإِنَّهُ يَسْلُكُ مِن بَيْنِ يَدَيْهِ وَمِنْ خَلْفِهِ رَصَداً ﴾

((He Alone is) the All-Knower of the Unseen, and He reveals to none His Unseen. Except to a Messenger (from mankind) whom He has chosen, and then He makes a band of watching guards (angels) to march before him and behind him.) ﴿72:26,27﴾. Allah then said,

﴿فَـَامِنُواْ بِاللَّهِ وَرُسُلِهِ﴾

(So believe in Allah and His Messengers.) Obey Allah and His Messenger and adhere to the law that he legislated for you,

﴿وَإِن تُؤْمِنُواْ وَتَتَّقُواْ فَلَكُمْ أَجْرٌ عَظِيمٌ﴾

(and if you believe and fear Allah, then for you there is a great reward.)