Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said, “We are the last nation but the foremost on the Day of Resurrection. They were given the book before us and we were given it after them. They disagreed about this day of Friday and Allah guided. Tomorrow is for the Jews and the day after tomorrow is for the Christians.”
Source: Ṣaḥīḥ al-Bukhārī 856, Ṣaḥīḥ Muslim 855
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ أَبِي هُرَيْرَةَ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَحْنُ الْآخِرُونَ السَّابِقُونَ يَوْمَ الْقِيَامَةِ أُوتُوا الْكِتَابَ مِنْ قَبْلِنَا وَأُوتِينَاهُ مِنْ بَعْدِهِمْ فَهَذَا الْيَوْمُ الَّذِي اخْتَلَفُوا فِيهِ فَهَدَانَا اللَّهُ فَغَدًا لِلْيَهُودِ وَبَعْدَ غَدٍ لِلنَّصَارَى
856 صحيح البخاري كتاب الجمعة باب فرض الجمعة
855 صحيح مسلم كتاب الجمعة باب هداية هذه الأمة ليوم الجمعة