Sunan Abu Dawud
5011
Sahih+2

Narrated Abdullah ibn Abbas: A desert Arab came to the Prophet (ﷺ) and began to speak. Thereupon the Messenger of Allah (ﷺ) said: In eloquence there is magic and in poetry there is wisdom

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid