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It was narrated that Abu Hurayrah and Hudhayfah (may Allaah be pleased with them) said: The Messenger of Allaah (peace and blessings of Allaah be upon him) said: “Allaah led those who came before us away from Friday. The Jews had Saturday, and the Christians had Sunday. Then Allaah brought us and Allaah guided us to Friday. So there is Friday, Saturday and Sunday, and thus they will follow us on the Day of Resurrection. We are the last of the people of this world but we will be the first on the Day of Resurrection, and we will be dealt with before all others.”

Narrated by Muslim, 856.

Al-Nawawi said:

Al-Qaadi said: The apparent meaning is that it was obligatory for them to venerate Friday but this was not stated clearly; the matter was left to their own reasoning… But they did not manage to work it out and Allaah did not guide them to it. It was enjoined clearly upon this ummah, and was not left to their own reasoning, thus they were blessed with it … It was narrated that Moosa enjoined Friday upon them and told them of its virtues, but they disputed with him and argued that Saturday was better, and it was said to him, ‘Let them be.’ Al-Qaadi said: if there had been a clear command, their arguing with him would not have been valid, rather it would have been said to him that they were going against the command. I say: it may be that that was clearly enjoined upon them but they disputed as to whether it was something they had to adhere to or they could change it to another day; they decided to change it to another day and they erred greatly thereby.