Musnad Ahmad 1118:16

Ibrahim ibn Ishaq narrated to us, Ibn al-Mubarak narrated to us, from Haywah ibn Shurayh, who said: Abu Hani al-Khawlani informed me that ‘Amr ibn Malik al-Janbi informed him that he heard Fudalah ibn ‘Ubayd narrating from the Messenger of Allah, peace and blessings of Allah be upon him, who said: "Whoever dies upon a station of these stations shall be resurrected upon it on the Day of Resurrection." Haywah said: He means, "a station of guarding the frontier (ribat), or Hajj, or something similar to that."