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Surah 6. Al-An'am
Ayah 156 - 158
156أَن تَقُولُوٓا۟ إِنَّمَآ أُنزِلَ ٱلْكِتَـٰبُ عَلَىٰ طَآئِفَتَيْنِ مِن قَبْلِنَا وَإِن كُنَّا عَن دِرَاسَتِهِمْ لَغَـٰفِلِينَ
157أَوْ تَقُولُوا۟ لَوْ أَنَّآ أُنزِلَ عَلَيْنَا ٱلْكِتَـٰبُ لَكُنَّآ أَهْدَىٰ مِنْهُمْ ۚ فَقَدْ جَآءَكُم بَيِّنَةٌ مِّن رَّبِّكُمْ وَهُدًى وَرَحْمَةٌ ۚ فَمَنْ أَظْلَمُ مِمَّن كَذَّبَ بِـَٔايَـٰتِ ٱللَّهِ وَصَدَفَ عَنْهَا ۗ سَنَجْزِى ٱلَّذِينَ يَصْدِفُونَ عَنْ ءَايَـٰتِنَا سُوٓءَ ٱلْعَذَابِ بِمَا كَانُوا۟ يَصْدِفُونَ
158هَلْ يَنظُرُونَ إِلَّآ أَن تَأْتِيَهُمُ ٱلْمَلَـٰٓئِكَةُ أَوْ يَأْتِىَ رَبُّكَ أَوْ يَأْتِىَ بَعْضُ ءَايَـٰتِ رَبِّكَ ۗ يَوْمَ يَأْتِى بَعْضُ ءَايَـٰتِ رَبِّكَ لَا يَنفَعُ نَفْسًا إِيمَـٰنُهَا لَمْ تَكُنْ ءَامَنَتْ مِن قَبْلُ أَوْ كَسَبَتْ فِىٓ إِيمَـٰنِهَا خَيْرًا ۗ قُلِ ٱنتَظِرُوٓا۟ إِنَّا مُنتَظِرُونَ
[156-158] Now you cannot say, "The Book was sent down to the two communities before us,137 and we were unaware of what they studied and taught. " And now you cannot put forward even this excuse: "If the Book had been sent down to us, we would have proved ourselves more righteous than they." Now that a clear proof and Guidance and Blessing, has come to you from your Lord, who can be more unjust than the one who treats Our Revelations as false and turns away from them?138 We will inflict the severest torment on those who turn away from Our Signs because of their aversion. Do the people now wait that the angels should come down before them, or that your Lord may Himself come down, or that manifest Signs139 of your Lord should appear? On the Day when some clear Signs of your Lord will appear, his faith shall not profit the man who did not believe before or who, while professing to believe, did not do good deeds.140 O Muhammad, say to them, "Well, you may wait if you will: We, too, will wait."
137That is, to the Jews and the Christians.
138Here "Ayat" are Allah's Revelations presented in the Holy Qur'an as well as His Messenger's noble character and the pure lives of the Believers which clearly distinguished them from the unbelievers, and also those wonderful phenomena of Nature which the Qur'an was putting forward as proofs of the truth of its Message.
139"Manifest Signs" are the signs of the Day of Resurrection or some imminent scourge or some other Sign that tray unveil the Reality in such a way as to leave no doubt about it and after which no more chance for test and trial might be left.
140That is, if after seeing these "Manifest Signs" a disbeliever repents of his disbelief and professes faith, such a conversion shall be meaningless; likewise the one who professes to believe but adopts the way of disobedience, shall be deemed to have no faith at all, because Faith and Obedience can have any value only up to the time that the reality remains hidden behind the curtain, and the prospect of a long life is ahead and the world with all its allurements is deluding one into believing that there is no Allah and no Hereafter; therefore, one should "Eat, drink and be merry."