Musnad Ahmad 788:73

Husayn ibn Muhammad narrated to us, Shu'bah narrated to us, from Ghalib, from Aws ibn Masruq or Masruq ibn Aws al-Yarbu'i from Banu Tamim, from Abu Musa, from the Prophet (peace and blessings of Allah be upon him), who said: "The fingers are equal." Shu'bah said: I said to him: "Ten [for each] ten?" He said: "Yes."