Narrated Anas bin Malik:
The Prophet (s.a.w.a.) came to some of his wives among whom there was Um Sulaim, and said, "May Allah be merciful to you, O Anjasha! Drive the camels slowly, as they are carrying glass vessels!" Abu Qalaba said, "The Prophet (s.a.w.a.) said a sentence (i.e. the above metaphor) which, had anyone of you said it, you would have admonished him for it".
Narrated Anas bin Malik:
Allah's Messenger (s.a.w.a.) was on a journey and he had a black slave called Anjasha, and he was driving the camels (very fast, and there were women riding on those camels). Allah's Messenger (s.a.w.a.) said, "Waihaka (Woe onto you), O Anjasha! Drive slowly (the camels) with the glass vessels (women)!"
Anas reported that Allah's Messenger (s.a.w.a.) had in one of his journeys his black slave who was called Anjasha along with him. Thereupon Allah's Messenger (s.a.w.a.) said:
Anjasha, drive slowly as you are driving glass vessels