Messenger of Allah ﷺ said "We are the last (to come amongst the nations) but (will be) the foremost on the Day of Resurrection. They were given the Holy Scripture before us and we were given the Quran after them. And this was the day (Friday) about which they differed and Allah gave us the guidance (for that). So tomorrow (i.e. Saturday) is the Jews' (day), and the day after tomorrow (i.e. Sunday) is the Christians'." The Prophet ﷺ remained silent (for a while) and then said, "It is obligatory for every Muslim that he should take a bath once in seven days, when he should wash his head and body." (Using translation from Bukhārī 896)
عَنِ النَّبِيِّ ﷺ قَالَ نَحْنُ الْآخِرُونَ السَّابِقُونَ بَيْدَ أَنَّ كُلَّ أُمَّةٍ أُوتُوا الْكِتَابِ مِنْ قَبْلِنَا وَأُوتِينَاهُ مِنْ بَعْدِهِمْ فَهَذَا الْيَوْمُ الَّذِي اخْتَلَفُوا فِيهِ فَهَدَانَا اللهُ لَهُ فَغَدًا لِلْيَهُودِ وَبَعْدَ غَدٍ لِلنَّصَارَى ثُمَّ سَكَتَ ثُمَّ قَالَ حَقٌّ عَلَى كُلِّ مُسْلِمٍ أَنْ يَغْتَسِلَ فِي كُلِّ سَبْعَةِ أَيَّامٍ يَوْمًا يَغْسِلُ رَأْسَهُ وَجَسَدَهُ