Saturday and Tuesday
Al-Kāfi|Volume 8|Book 1|Chapter 109
وَ بِهَذَا الْإِسْنَادِ عَنْ حَفْصٍ عَنْ أَبِي عَبْدِ اللَّهِ (عليه السلام) قَالَ مَنْ كَانَ مُسَافِراً فَلْيُسَافِرْ يَوْمَ السَّبْتِ فَلَوْ أَنَّ حَجَراً زَالَ عَنْ جَبَلٍ يَوْمَ السَّبْتِ لَرَدَّهُ اللَّهُ عَزَّ ذِكْرُهُ إِلَى مَوْضِعِهِ وَ مَنْ تَعَذَّرَتْ عَلَيْهِ الْحَوَائِجُ فَلْيَلْتَمِسْ طَلَبَهَا يَوْمَ الثَّلَاثَاءِ فَإِنَّهُ الْيَوْمُ الَّذِي أَلَانَ اللَّهُ فِيهِ الْحَدِيدَ لِدَاوُدَ (عليه السلام).
109. And by this chain, from Hafs, who has reported the following: Abu Abdullah عليه الصلاة والسلام said: ‘The one who wants to travel so he should do so on the day of Saturday. Even if a stone falls off a mountain on the day of Saturday, Allah عز وجل would Return it to its place. And the one who is unable to fulfill his need should seek it on the day of Tuesday, for it is the day in which Allah عز وجل Softened the iron for Dawood عليه السلام’.
- Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (15/343)
- Ṣaḥīḥ al-Kāfī