Narrated Anas bin Malik: On the day of the battle of the Trench (i.e. Ghazwat-ul-Khandaq) the Ansar used to say, We are those who have given the pledge of allegiance to Muhammad for Jihad (i.e. holy fighting) as long as we live. The Prophet , replied to them, O Allah! There is no life except the life of the Hereafter; so please honor the Ansar and the Emigrants.