Musnad Ahmad 32:101

Ibn Abi ‘Adi narrated to us, from Humayd, from Anas, who said: There was a man who used to drive [the camels carrying] the Mothers of the Believers, who was called Anjashah. He was intense in his driving, so the Messenger of Allah (ﷺ) said to him: "O Anjashah, go gently, driving with the glass vessels."