Surah Aali Imran (The Family of Imran), Verse 179

مَا كَانَ اللّٰهُ لِیَذَرَ الْمُؤْمِنِیْنَ عَلٰی مَاۤ اَنْتُمْ عَلَیْهِ حَتّٰی یَمِیْزَ الْخَبِیْثَ مِنَ الطَّیِّبِ وَمَا كَانَ اللّٰهُ لِیُطْلِعَكُمْ عَلَی الْغَیْبِ وَلٰكِنَّ اللّٰهَ یَجْتَبِیْ مِنْ رُّسُلِهٖ مَنْ یَّشَآءُ فَاٰمِنُوْا بِاللّٰهِ وَرُسُلِهٖ وَاِنْ تُؤْمِنُوْا وَتَتَّقُوْا فَلَكُمْ اَجْرٌ عَظِیْمٌ ۟

Maa kaanal laahu liyazaral mu'mineena 'alaa maaa antum 'alaihi hattaa yameezal khabeesa minat taiyib; wa maa kaanal laahu liyutli'akum 'alal ghaibi wa laakinnal laaha yajtabee mir rusulihee mai yashaaa'; fa aaminoo billaahi wa Rusulih; wa in tu 'minoo wa tattaqoo falakum ajrun 'azeem

“Allah will not leave the believers in the state in which ye are now, until He separates what is evil from what is good nor will He disclose to you the secrets of the Unseen. But He chooses of His Messengers (For the purpose) whom He pleases. So believe in Allah. And His messengers: And if ye believe and do right, ye have a reward without measure.”

Quran 3:179 (Yusuf Ali Translation)