Hadithcore
Sunan Abi Dawud, 5007
sahih· Al-Albani

‘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 (ﷺ) 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 ‏"‏ ‏.‏

References2 variants
In-Book Reference
Book 43, Hadith 235
English Reference
Book 42, Hadith 4989