Musnad Abu Ya'la al-Mawsili 107:7

Zuhayr narrated to us, Abdullah bin Yazid narrated to us, Qabath bin Razin al-Masri narrated to us, he said: I heard Ali bin Rabah al-Lakhmi say: I heard Uqbah bin Amir al-Juhani say: We were sitting in the mosque reciting the Quran, and the Messenger of Allah (peace and blessings of Allah be upon him) entered upon us and said: "Learn the Book of Allah and spread it." Qabath said: I think he said: "And sing it (recite it with a melodious voice), for by the One in Whose hand is my soul, it is more prone to escaping than the hobbled camels are from their ropes."