Musnad Ahmad 760:5

Ibn Numayr narrated to us, as-Salt—meaning Ibn al-Awwam—narrated to us, he said: al-Harith ibn Wahb narrated to me, from Abu Abd ar-Rahman as-Sunabahi, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "My nation will remain in a state of goodness so long as they do not do three things: so long as they do not delay the Maghrib prayer until the darkness sets in, in imitation of the Jews; and so long as they do not delay the Fajr prayer until the stars fade away, in imitation of the Christians; and so long as they do not leave the funerals to their own families [without participating in them]."