Al-Kāfi - Volume 5 > The Recommendations of the Messenger of Allah and Amir al-Mu’minin, about Smaller Armed Expeditions
Hadith #5

5- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ أَبَانِ بْنِ عُثْمَانَ عَنْ يَحْيَى بْنِ أَبِي الْعَلاءِ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ كَانَ أَمِيرُ الْمُؤْمِنِينَ (صَلَّى اللهُ عَلَيْهِ وَآلِه) لا يُقَاتِلُ حَتَّى تَزُولَ الشَّمْسُ وَيَقُولُ تُفَتَّحُ أَبْوَابُ السَّمَاءِ وَتُقْبِلُ الرَّحْمَةُ وَيَنْزِلُ النَّصْرُ وَيَقُولُ هُوَ أَقْرَبُ إِلَى اللَّيْلِ وَأَجْدَرُ أَنْ يَقِلَّ الْقَتْلُ وَيَرْجِعَ الطَّالِبُ وَيُفْلِتَ الْمُنْهَزِمُ.

5. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from Aban ibn ‘Uthman from Yahya ibn abu al-‘Ala’ who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said that Amir al-Mu’minin, ‘Alayhi al-Salam, would not launch attacks against the enemy until after the declining of the sun toward the west. He would say, ‘At such time the doors of heaven open up, mercy comes forward and victory descends.’ He would also say, ‘Such time is closer to the night, prone to reduced killing, pursuers return and fleeing ones disappear.’”