Sunnan Abu Dawud Collection: ::Book Number 38:: Hadith # 4395
Narrated AbuDharr: The Apostle of Allah (peace_be_upon_him) said to me: O AbuDharr: I replied: At your service and at your pleasure, Apostle of Allah! He said: how will you do when death smites people, and a house, meaning a grave, will cost as much as a slave. I said: Allah and His Apostle know best, or he said: What Allah and His Apostle choose for me. He said: Show endurance, or he said: You may show endurance.