Musnad Ahmad 32:1838

Abdullah ibn Bakr 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, cowardice, stinginess, the trial of the Dajjal, and the punishment of the grave."