Sahih Muslim | Book 30 | Hadith Number 5743

Narrated by Anas
Anas reported that Allah's Messenger (may peace be upon him) had in one of his journeys his black slave who was called Anjasha along with him. He goaded by singing the songs of camel-driver. Thereupon Allah's Messenger (may peace be upon him) said: Anjasha, drive slowly as you are driving (the mounts who are carrying) glass vessels