‘Abd Allah b. ‘Umar said :When two men who came from the east made a speech and the people were charmed with their eloquence, the Messenger of Allah (May peace be upon him) said: In some eloquent speech there is magic.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّهُ قَالَ قَدِمَ رَجُلاَنِ مِنَ الْمَشْرِقِ فَخَطَبَا فَعَجِبَ النَّاسُ - يَعْنِي لِبَيَانِهِمَا - فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِنَّ مِنَ الْبَيَانِ لَسِحْرًا " . أَوْ " إِنَّ بَعْضَ الْبَيَانِ لَسِحْرٌ " .
AbuDaud
General Behavior (Kitab Al-Adab) • Hadith 5007