'Abdullah bin 'Amr bin Al-As (May Allah be pleased with them) said:
The Messenger of Allah (ﷺ) said, "Verily, Allah dislikes an eloquent person who rolls his tongue as a cow rolls its tongue (while eating)."[Abu Dawud and At- Tirmidhi]. (ES)
App reference (ES): Book 18, Hadith 227 (ES)
Arabic/English book reference (ES): Book 18, Hadith 1737 (ES)