Volume 2, Book 13, Number 1:
Narrated Abu Huraira:
I heard Allah’s Apostle (p.b.u.h) saying, “We (Muslims) are the last (to come) but (will be) the fore –
most on the Day of Resurrection though the former nations were given the Holy Scriptures before us.
And this was their day (Friday) the celebration of which was made compulsory for them but they
differed about it. So Allah gave us the guidance for it (Friday) and all the other people are behind us
in this respect: the Jews’ (holy day is) tomorrow (i.e. Saturday) and the Christians’ (is) the day after
tomorrow (i.e. Sunday).”