Musnad Abu Ya'la al-Mawsili 160:239

Muhammad ibn Abdullah al-Mukharrimi narrated to us, Yunus ibn Muhammad narrated to us, Ash'ath ibn Barraz narrated to us, Qatadah narrated from Abdullah ibn Shaqiq, from Abu Hurairah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The first thing to be lifted from this nation is modesty and trustworthiness, and the last thing that will remain of it is prayer. It is imagined to me that he said: And there may be people who pray while they have no share [in the reward of the Hereafter]."