The incident is of the time when Nabi (PBUH) and his companions were sitting at a place, and the funeral procession of a Jew passed by. Seeing this, Nabi (PBUH) stood up in respect. The companions were surprised and asked, “This was the funeral procession of a Jew?” Nabi (PBUH) replied, “Wasn’t that a soul?”

This hadith is mentioned in both Sahih Bukhari and Sahih Muslim, and it shows that Nabi (PBUH) used to respect every human being, irrespective of his religion.