Musnad Ahmad 30:217

Sufyan said in the hadith of Abu al-Zinad, from al-A’raj, from Abu Hurayrah, and Ibn Jurayj, from al-Hasan ibn Muslim, from Tawus, from Abu Hurayrah, from the Prophet (peace and blessings of Allah be upon him): "The coat of mail is made perfect, or I have been commanded [to make it so], it covers his fingertips and erases his tracks; he widens it." Abu al-Zinad said: "He widens it, but it does not become wide." Ibn Jurayj said, from al-Hasan ibn Muslim: "And it does not become wide."