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

حَدَّثَنَا أَبُو الرَّبِيعِ الْعَتَكِيُّ، وَحَامِدُ بْنُ عُمَرَ، وَقُتَيْبَةُ بْنُ سَعِيدٍ، وَأَبُو كَامِلٍ جَمِيعًا عَنْ حَمَّادِ بْنِ زَيْدٍ، قَالَ أَبُو الرَّبِيعِ حَدَّثَنَا حَمَّادٌ، حَدَّثَنَا أَيُّوبُ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَنَسٍ، قَالَ كَانَ رَسُولُ اللَّهِ ﷺ فِي بَعْضِ أَسْفَارِهِ وَغُلاَمٌ أَسْوَدُ يُقَالُ لَهُ أَنْجَشَةُ يَحْدُو فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ " يَا أَنْجَشَةُ رُوَيْدَكَ سَوْقًا بِالْقَوَارِيرِ " .