The Prophecy of Rasulullah (sallallahu ‘alaihi wasallam) regarding Hazrat Abu Zar (radhiyallahu ‘anhu) Passing Away Alone
Hazrat Abdullah bin Mas‘ood (radhiyallahu ‘anhu) narrates:
When Rasulullah (sallallahu ‘alaihi wasallam) departed for Tabook, some people began to remain behind in order to abandon the expedition. As this would happen, the Sahaabah (radhiyallahu ‘anhum) would inform Rasulullah (sallallahu ‘alaihi wasallam) saying, “O Rasul of Allah (sallallahu ‘alaihi wasallam)! So and so has remained behind.” On hearing this, Rasulullah (sallallahu ‘alaihi wasallam) would say, “Leave him. If there is any good in him then he will soon join us. If there is no good in him then Allah Ta‘ala has relieved you of his presence.” This continued until someone eventually called out to Rasulullah (sallallahu ‘alaihi wasallam), “O Rasul of Allah (sallallahu ‘alaihi wasallam)! Hazrat Abu Zar (radhiyallahu ‘anhu) has remained behind on account of his camel not being able to move.”
When Hazrat Abu Zar (radhiyallahu ‘anhu) saw that he was unable to travel with his camel, he placed his luggage on his back and departed on foot to join Rasulullah (sallallahu ‘alaihi wasallam). After some time, one of the companions of Rasulullah (sallallahu ‘alaihi wasallam) glanced behind and called out, “There is a man walking on the road!” On hearing this, Rasulullah (sallallahu ‘alaihi wasallam) eagerly exclaimed, “Let it be Hazrat Abu Zar (radhiyallahu ‘anhu)!” When the Sahaabah (radhiyallahu ‘anhum) looked closely at the person approaching on foot and identified him, they called out, “By Allah! It is Hazrat Abu Zar (radhiyallahu ‘anhu)!” Rasulullah (sallallahu ‘alaihi wasallam) then made du‘aa saying, “May Allah have mercy on Hazrat Abu Zar (radhiyallahu ‘anhu)! He is walking alone, he will pass away alone and he will be resurrected alone.”
(Siyar A’laam min Nubalaa 3/384)
Source: Whatisislam.co.za