Muhammad bin Yahya bin Abi 'Umar محمد بن يحيى بن أبي عمر العدني · The Book on Jana''iz (Funerals)

The Messenger of Allah said: "When one of you shrouds his brother, then let him use the best of his shrouds."

"Ibn Abbas performed Salat for a funeral and he recited Fatihatil-Kitab. So I asked him about it and he said: 'It is from the Sunnah' or, 'From the completeness of the Sunnah.'"