Ishaq bin Yusuf bin Mrdas إسحاق بن يوسف بن مرداس · The Book of Funerals

'Amr bin Shu'aib wrote to 'Abdullah bin 'Abdur-Rahman bin Abi Husain to offer condolences for a son of his who had died. In his letter he mentioned that he had heard his father narrate, that his grandfather, 'Abdullah bin 'Amr bin Al-As said: "The Messenger of Allah said: 'Allah does not approve for His believing slave, if He takes away his loved one from among the people of the Earth, and he bears that with patience and seeks reward, and…

"Bury the slain where they fell."