Musnad Ahmad 32:225

Yahya narrated to us, he said: Sulayman al-Taymi narrated to us, from Anas, who said: Umm Sulaym was with the wives of the Prophet, may God bless him and grant him peace, and there was a camel driver driving them. The Messenger of God, may God bless him and grant him peace, came upon them and said: "O Anjashah, drive gently with the glass vessels."