Part of a lengthy hadith as narrated from Imam Ali ibn Husayn (عليما السلام):

إِنَّ إِبْلِيسَ لَعَنَهُ اللَّهُ فِي ذَلِكَ الْيَوْمِ يَطِيرُ فَرَحاً فَيَجُولُ الْأَرْضَ كُلَّهَا بِشَيَاطِينِهِ وَ عَفَارِيتِهِ فَيَقُولُ يَا مَعَاشِرَ الشَّيَاطِينِ قَدْ أَدْرَكْنَا مِنْ ذُرِّيَّةِ آدَمَ الطَّلِبَةَ وَ بَلَغْنَا فِي هَلَاكِهِمْ الْغَايَةَ وَ أَوْرَثْنَاهُمُ النَّارَ إِلَّا مَنِ اعْتَصَمَ بِهَذِهِ الْعِصَابَةِ فَاجْعَلُوا شُغُلَكُمْ بِتَشْكِيكِ النَّاسِ فِيهِمْ وَ حَمْلِهِمْ عَلَى عَدَاوَتِهِمْ وَ إِغْرَائِهِم بِهِمْ وَ أَوْلِيَائِهِمْ حَتَّى تَسْتَحْكِمُوا ضَلَالَةَ الْخَلْقِ وَ كُفْرَهُمْ وَ لَا يَنْجُو مِنْهُمْ نَاجٍ

"On that day (i.e. Ashura) – Iblis (Satan) will fly in joy, He will roam around the earth along with his devils and demons and will call out to them, O group of Shayateen! We have truly achieved our goal with the children of Adam. We have attained our target in their destruction, and we have caused them all to inherit Hell, except those who adhere/hold-on to this group (i.e. the AhlulBayt ع).

So keep your focus in creating doubts among the people about them (i.e. the AhlulBayt ع) and in encouraging enmity towards them and incite them against them and their friends, until you establish/strengthen the misguidance and disbelief (kufr) of the people and no one from them is saved."

[Source: Kamil al-Ziyarat, Ch.88, Hadith.1]