Surah Yusuf, ayah 15

فَلَمَّا ذَهَبُواْ بِهِۦ وَأَجۡمَعُوٓاْ أَن يَجۡعَلُوهُ فِي غَيَٰبَتِ ٱلۡجُبِّۚ وَأَوۡحَيۡنَآ إِلَيۡهِ لَتُنَبِّئَنَّهُم بِأَمۡرِهِمۡ هَٰذَا وَهُمۡ لَا يَشۡعُرُونَ ١٥

Falammā dhahabū bihī wa ajma'ū an yaj'alūhu fī ghayābatil-jubbi wa awhaynā ilayhi latunabbi'annahum bi amrihim hādhā wahum lā yash'urūn

So when they took him [out] and agreed to put him into the bottom of the well...⁵⁸⁷ But We inspired to him, "You will surely inform them [someday] about this affair of theirs while they do not perceive [your identity]."