Read and reflect on verse 947 from Surah Al-An'aam: Do they, perchance, wait for the angels to appear unto them, or for thy Sustainer [Himself] to appear, or for some of thy Sustainer's [final] portents...
هَلْ يَنْظُرُونَ إِلَّا أَنْ تَأْتِيَهُمُ الْمَلَائِكَةُ أَوْ يَأْتِيَ رَبُّكَ أَوْ يَأْتِيَ بَعْضُ آيَاتِ رَبِّكَ ۗ يَوْمَ يَأْتِي بَعْضُ آيَاتِ رَبِّكَ لَا يَنْفَعُ نَفْسًا إِيمَانُهَا لَمْ تَكُنْ آمَنَتْ مِنْ قَبْلُ أَوْ كَسَبَتْ فِي إِيمَانِهَا خَيْرًا ۗ قُلِ انْتَظِرُوا إِنَّا مُنْتَظِرُونَ
Do they, perchance, wait for the angels to appear unto them, or for thy Sustainer [Himself] to appear, or for some of thy Sustainer's [final] portents to appear? [But] on the Day when thy Sustainer's [final] portents do appear, believing will be of no avail to any human being who did not believe before, or who, while believing, did no good works. Say: "Wait, [then, for the Last Day, O unbelievers:] behold, we [believers] are waiting, too!"