Qur'an 72:27

إِلَّا مَنِ ٱرْتَضَىٰ مِن رَّسُولٍ فَإِنَّهُۥ يَسْلُكُ مِنۢ بَيْنِ يَدَيْهِ وَمِنْ خَلْفِهِۦ رَصَدًا

“Except whom He has approved of messengers, and indeed, He sends before him [i.e., each messenger] and behind him observers”

Al-Jinn 72:27 · Saheeh International