Musnad Ahmad 1118:8

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 Fadalah 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." Haywah said: "He means: guarding the frontier, Hajj, or something similar." And al-Taliqani narrated it to us, with this chain of narration from Ibn al-Mubarak, who said: "The rider should greet the walker, the walker should greet the one standing, and the few should greet the many."