Jami` at-Tirmidhi, Hadith 3339 ⓘ
Abu Hurairah narrated that : the Messenger of Allah said: “Al-Yawmul-Maw’ud (the Promised Day) is the Day of Resurrection, and Al-Yawmul-Mashhud (the Attended Day) is the Day of Arafah, and Ash-Shahid (the witness) is Friday.” He said: “The sun does not rise nor set, upon a day that is more virtuous than it. In it, there is an hour in which no believing worshipper makes a supplication to Allah for good, except that Allah answers it for him, and he does not seek Allah’s aid for something, except that He aids him in it.”
حَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ، حَدَّثَنَا رَوْحُ بْنُ عُبَادَةَ، وَعُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنْ مُوسَى بْنِ عُبَيْدَةَ، عَنْ أَيُّوبَ بْنِ خَالِدٍ، عَنْ عَبْدِ اللَّهِ بْنِ رَافِعٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " الْيَوْمُ الْمَوْعُودُ يَوْمُ الْقِيَامَةِ وَالْيَوْمُ الْمَشْهُودُ يَوْمُ عَرَفَةَ وَالشَّاهِدُ يَوْمُ الْجُمُعَةِ وَمَا طَلَعَتِ الشَّمْسُ وَلاَ غَرَبَتْ عَلَى يَوْمٍ أَفْضَلَ مِنْهُ فِيهِ سَاعَةٌ لاَ يُوَافِقُهَا عَبْدٌ مُؤْمِنٌ يَدْعُو اللَّهَ بِخَيْرٍ إِلاَّ اسْتَجَابَ اللَّهُ لَهُ وَلاَ يَسْتَعِيذُ مِنْ شَرٍّ إِلاَّ أَعَاذَهُ اللَّهُ مِنْهُ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ لاَ نَعْرِفُهُ إِلاَّ مِنْ حَدِيثِ مُوسَى بْنِ عُبَيْدَةَ . وَمُوسَى بْنُ عُبَيْدَةَ يُضَعَّفُ فِي الْحَدِيثِ ضَعَّفَهُ يَحْيَى بْنُ سَعِيدٍ وَغَيْرُهُ مِنْ قِبَلِ حِفْظِهِ .
also referenced under: Book 47, Hadith 3661 (In-Book) & Volume 6, Book 44, Hadith 3339 (DarusSalam)