Sunan Ibn Majah, Chapter: Chapters Regarding Funerals

"The Messenger of Allah (saw) opened a door that was between him and the people or drew back a curtain and he saw the people praying behind Abu Bakr. He praised Allah for what he saw of their good situation and hoped that Allah succeed him by what he saw in them. He said: 'O people, whoever among the people or among the believers is stricken with a calamity, then let him console himself with the loss of me, for no one among my nation will be stricken with any calamity worse than my loss.'" Daif