Musnad Ahmad 30:3330

Hajjaj narrated to us, Shu'bah narrated to us, from Muhammad ibn Ziyad, from Abu Hurairah, from the Prophet (peace and blessings of Allah be upon him) that he said: "Indeed, there is an hour in Friday; no Muslim servant coincides with it while praying, asking Allah for good, but He gives it to him." And Abu Hurairah said: "He makes it short with his hand." Hajjaj said: Shu'bah said: And Ibn 'Awn narrated to me, from Ibn Sirin, from Abu Hurairah, from the Prophet (peace and blessings of Allah be upon him) the like of that.