Mishkat al-Masabih 19 Jihad كتاب الجهاد 166

وَعَنْ أَبِي أُسَيْدٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَوْمَ بَدْرٍ: «إِذَا أَكْثَبُوكُمْ فَارْمُوهُمْ وَلَا تَسُلُّوا السُّيُوفَ حَتَّى يَغْشَوْكُمْ» . رَوَاهُ أَبُو دَاوُدَ

Abu Usaid reported God’s Messenger as saying at the battle of Badr, “When they come near you shoot at them, but do not draw your swords till they are close upon you.” Abu Dawud transmitted it.