مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 3892
Jihad
Conduct while Traveling - Section 1
عَن كَعْب بْنِ مَالِكٍ: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ خَرَجَ يَوْمَ الْخَمِيسِ فِي غَزْوَةِ تَبُوكَ وَكَانَ يُحِبُّ أَنْ يَخْرُجَ يَوْمَ الْخَمِيسِ. رَوَاهُ البُخَارِيّ
Ka'b b. Malik said that the Prophet (ﷺ) set out on a Thursday in the expedition to Tabuk and that he used to like to set out on a Thursday. Bukhari transmitted it.
Mishkat al-Masabih, 3892صَحِيح (الألباني)