Musnad Ahmad 28:572

Ibrahim ibn Abi al-Abbas narrated to us, Baqiyyah narrated to us, Mu'awiyah ibn Sa'id al-Tujibi narrated to me, I heard Abu Qubayl al-Masri saying: I heard Abdullah ibn Amr ibn al-As saying: The Messenger of Allah, peace and blessings of Allah be upon him, said: "Whoever dies on the day of Friday or the night of Friday, he is protected from the trial of the grave."