Except whom He has approved of messengers, and indeed, He sends before each messenger and behind him observers
The Saheeh International Quran Translation
إِلَّا مَنِ ٱرْتَضَىٰ مِن رَّسُولٍ فَإِنَّهُۥ يَسْلُكُ مِنۢ بَيْنِ يَدَيْهِ وَمِنْ خَلْفِهِۦ رَصَدًاExcept whom He has approved of messengers, and indeed, He sends before each messenger and behind him observers