Musnad Ahmad 32:856

Isma'il narrated to us, Sulayman al-Taymi narrated to us, Anas ibn Malik narrated to us, saying: Umm Sulaym was with the wives of the Prophet, may Allah bless him and grant him peace. The Prophet, may Allah bless him and grant him peace, came upon them while a camel driver was driving them. He said to him: "O Anjashah, go gently with the glass vessels."