Musnad Ahmad 788:77

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from Ghalib al-Tammar, who said: I heard Aws ibn Masruq—a man from among us who had taken the two dirhams during the era of Umar ibn al-Khattab, may Allah be pleased with him, and fought in his caliphate—narrating from Abu Musa, from the Prophet, peace and blessings of Allah be upon him, that he said: "The fingers are equal." Shu'bah said: I said, "Ten [for each] ten?" He said, "Yes."