Yahya related to me from Malik from Abu'z Zinad from al-Araj fromAbu Hurayra that the Messenger of Allah, may Allah bless him and granthim peace, mentioned the day of jumua and said, "There is a time in itwhen Allah gives to a muslim slave standing in prayer whatever he asksfor," and the Messenger of Allah, may Allah bless him and grant himpeace, indicated with his hand how small it was.
USC-MSA web (English) reference: Book 5, Hadith 16
Arabic reference: Book 5, Hadith 239