كتاب الجمعة
7  
The Book of Prayer - Friday
(4)
Chapter: The (special) time that occurs on Friday
(4)
باب فِي السَّاعَةِ الَّتِي فِي يَوْمِ الْجُمُعَةِ ‏
Sahih Muslim 852 e

Abu Huraira reported Allah's Apostle (ﷺ) as saying:

"There is a time on Friday at which no Muslim would ask Allah for what is good but He would give it to him." And further said: "This is a very short time."
وَحَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ سَلاَّمٍ الْجُمَحِيُّ، حَدَّثَنَا الرَّبِيعُ، - يَعْنِي ابْنَ مُسْلِمٍ - عَنْ مُحَمَّدِ بْنِ زِيَادٍ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ قَالَ ‏ "‏ إِنَّ فِي الْجُمُعَةِ لَسَاعَةً لا يُوَافِقُهَا مُسْلِمٌ يَسْأَلُ اللَّهَ فِيهَا خَيْرًا إِلاَّ أَعْطَاهُ إِيَّاهُ ‏"‏ ‏.‏ قَالَ وَهِيَ سَاعَةٌ خَفِيفَةٌ
Reference : Sahih Muslim 852e
In-book reference : Book 7, Hadith 23
USC-MSA web (English) reference : Book 4, Hadith 1853
  (deprecated numbering scheme)