Musnad Ahmad 32:1528

Muhammad ibn Abdullah narrated to us, Humayd narrated to us, he said: Anas was asked about the punishment of the grave, or about the Dajjal, so he said: The Messenger of Allah, peace and blessings of Allah be upon him, used to say: "O Allah, I seek refuge in You from laziness and old age, and cowardice and stinginess, and the trial of the Dajjal, and the punishment of the grave."