Anas reported that Allah's Messenger (ﷺ) 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 (ﷺ) said:Anjasha, drive slowly as you are driving (the mounts who are carrying) glass vessels

This hadith has been narrated on the authority of Anas through another chain of transmitters

Anas reported that Allah's Apostle (ﷺ) came to his wives as the camel-driver who was called Anjasha had been, driving (the camels) on which (they were riding). Thereupon he said:Anjasha, be careful, drive slowly for you are driving the mounts who carry vessels of glass. Abu Qilaba said that Allah's Messenger (ﷺ) uttered words which if someone had uttered amongst you, you would have found fault with him

Anas b. Malik reported that Umm Sulaim was with the wives of Allah's Apostle (ﷺ) and a camel-driver had been driving (the camels) oil which they were riding. Thereupon Allah's Apostle (ﷺ) said:Anjasha, drive slowly, for you are carrying (on the camels) vessels of glass

Anas reported that Allah's Messenger (ﷺ) had a camel-driver who had a very melodious voice. Allah's Messenger (ﷺ) said to him:Anjasha, drive slowly; do not break the vessels of glass, meaning the weak women

Anas reported this hadith through another chain of transmitters, but he made no mention of a camel-driver having a melodious voice