Hadith 31-146

وَبِهذَا الإِسنادِ عَنْ جَعْفَرِ بْنِ مُحَمَّدٍّعَلَيْهِمَا السَّلاَمُ قالَ: السَّبتُ لَنا، وَالأَحَدُ لِشِيعَتِنا، وَالإِثنَينِ لِبَني أُمَيَّةَ وَالثُّلاثاءُ لَشيعَتِهِم، وَالأَرْبَعاءُ لِبَني العَبَّاسِ وَالْخَمِيسُ لِشيعَتِهِم وَالجُمُعَةُ لِسائِرٍ النَّاسِ جَمِيعاً، وَلَيْسَ فِيهِ سَفَرٌ، قالَ اللَّهُ تَعالى‏: (فَإِذا قُضِيَتِ الصَّلاةُ فَانْتَشِرُوا فِي الأَرْضِ وَابْتَغُوا مِنْ فَضْلِ اللَّهِ) يَعْنِي يَوْمَ السَّبتِ.

According to the same documentation, on the authority of Ja’far ibn Muhammad (a.s.), “Saturday is for us and Sunday is for our followers. Monday is for the Umayyads. Tuesday is for their followers. Wednesday is for the Abbasids. Thursday is for their followers. Friday is for the rest of the people. One should not go traveling on Fridays as the Sublime God meant Friday when He (a.s.) said, ‘And when the Prayer is finished, then may ye disperse through the land, and seek of the Bounty of God: and celebrate the Praises of God often (and without stint): that ye may prosper.’ [42]