#2902 Narrated Salim Abu An-Nadr:
(the freed slave of 'Umar bin 'Ubaidullah) I was Umar's clerk. Once
Abdullah bin Abi Aufa wrote a letter to 'Umar when he proceeded to
Al-Haruriya. I read in it that Allah's Messenger (ﷺ) in one of his military
expeditions against the enemy, waited till the sun declined and then
he got up amongst the people saying, "O people! Do not wish to meet
the enemy, and ask Allah for safety, but when you face the enemy, be
patient, and remember that Paradise is under the shades of swords."
Then he said, "O Allah, the Revealer of the Holy Book, and the Mover
of the clouds and the Defeater of the clans, defeat them, and grant us
victory over them."