Musnad Ahmad 32:1726

Abu Kamil narrated to us, Hammad narrated to us, from Thabit, from Anas ibn Malik, that al-Bara’ ibn Malik used to chant for the men, and Anjashah used to chant for the women, and he had a beautiful voice. He chanted, and the camels quickened their pace. The Messenger of Allah (peace and blessings of Allah be upon him) said: "O Anjashah, gently, drive the glass vessels carefully."