Musnad Ahmad 28:106

Abu Amir narrated to us, Hisham—meaning Ibn Sa'd—narrated to us, from Sa'id ibn Abi Hilal, from Rabi'ah ibn Sayf, from Abdullah ibn Amr, from the Prophet, peace and blessings of Allah be upon him, who said: "There is no Muslim who dies on the day of Friday or the night of Friday, except that Allah protects him from the trial of the grave."