The Messenger of Allah ﷺ said, "Allah detests the eloquent man who rolls his tongue around as a cow rolls its tongue around."
حدثنا محمد بن عبد الأعلى الصنعاني حدثنا عمر بن علي المقدمي حدثنا نافع بن عمر الجمحي عن بشر بن عاصم سمعه يحدث عن أبيه
أن رسول الله ﷺ قال إن الله يبغض البليغ من الرجال الذي يتخلل بلسانه كما تتخلل البقرة
[Its isnad is hasan]. Abu Dawud also narrated it in the Book of Manners, in the chapter on what has been said about affected speech, hadith no. 5005, from the hadith of Nafi bin Umar, by the same route.Bishr is Ibn Aasim bin Sufyan Thaqafi Taifi.There is also a narration on this topic from Saad bin Abu Waqqas [Ahmad 1/184].