Hadith 1:66
Sahīh (Zubair `Aliza'i)
He also reported God’s messenger as saying, "The devil has despaired of being worshipped by those who engage in prayer in Arabia, but he has hopes of setting them against one another.” Muslim transmitted it.
وَعَنْ جَابِرٍ قَالَ سَمِعْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ: «إِن الشَّيْطَان قد أيس أَنْ يَعْبُدَهُ الْمُصَلُّونَ فِي جَزِيرَةِ الْعَرَبِ وَلَكِنَّ فِي التحريش بَينهم» . رَوَاهُ مُسلم
Original Reference: Mishkat al-Masabih 72