Hadith 159

ـ (لما افتَتَحَ - صلى الله عليه وسلم - مكةَ؛ رَنَّ إبليسُ رنّةً اجتمعتْ إليه جنودُه، فقالَ: ايْأَسُوا أن نرى أمّةَ محمّدٍ على الشّركِ بعْدَ يومِكم هذا! ولكنِ افتنُوهم في دينِهِم، وأَفْشُوا فيهم النَّوحَ) .
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says: When the Prophet (ﷺ) conquered Makkah, Iblis began to cry with a sorrowful voice, and his army gathered around him. He said: Despair, for after today we will not be able to see the Ummah of Muhammad (ﷺ) involved in shirk. Now, create tribulations in their religion and spread lamentation widely.
Hadith Reference سلسله احاديث صحيحه / الايمان والتوحيد والدين والقدر / 159