Jihad (Kitab Al-Jihad)
Dawud :: Book 14 : Hadith 2649
Narrated An-Nu'man ibn Muqarrin:
I was present at fighting along with the Apostle of Allah (peace_be_upon_him), and when he did not fight at the beginning of the day, he waited till the sun had passed the meridian, the winds blew, and help came down.