Authentic
Sahih Muslim 856a
It was Friday from which Allah diverted those who were before us. For the Jews (the day set aside for prayer) was Sabt (Saturday), and for the Christians it was Sunday. And Allah turned towards us and guided us to Friday (as the day of prayer) for us. In fact, He (Allah) made Friday, Saturday and…
أَضَلَّ اللَّهُ عَنِ الْجُمُعَةِ مَنْ كَانَ قَبْلَنَا فَكَانَ لِلْيَهُودِ يَوْمُ السَّبْتِ وَكَانَ لِلنَّصَارَى يَوْمُ الأَحَدِ فَجَاءَ اللَّهُ بِنَا فَهَدَانَا اللَّهُ لِيَوْمِ الْجُمُعَةِ فَجَعَلَ الْجُمُعَةَ…