Arabic hadith text
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم ذَكَرَ يَوْمَ الْجُمُعَةِ فَقَالَ ‏"‏ فِيهِ سَاعَةٌ لاَ يُوَافِقُهَا عَبْدٌ مُسْلِمٌ وَهُوَ قَائِمٌ يُصَلِّي يَسْأَلُ اللَّهَ شَيْئًا إِلاَّ أَعْطَاهُ إِيَّاهُ ‏"‏ ‏.‏ وَأَشَارَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِيَدِهِ يُقَلِّلُهَا ‏.‏
Translation

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.