Musnad Abu Ya'la al-Mawsili 155:215

On the authority of Abu Hurairah, he said: Abu al-Qasim (peace and blessings of Allah be upon him) said regarding Friday: "There is an hour in it; no Muslim stands praying during it, asking Allah for good, but He gives it to him." And he gestured with his hand, indicating that it is short and brief.