Narrated Jabir: We were with the Prophet (ﷺ) when a funeral passed hi and he stood up for it. When we went to carry it, we found that it was a funeral of a Jew. We, therefore said: Messenger of Allah, this is the funeral of a Jew. He said: Death is fearful event, so when you see a funeral, stand up.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا مُؤَمَّلُ بْنُ الْفَضْلِ الْحَرَّانِيُّ، حَدَّثَنَا الْوَلِيدُ، حَدَّثَنَا أَبُو عَمْرٍو، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ عُبَيْدِ اللَّهِ بْنِ مِقْسَمٍ، حَدَّثَنِي جَابِرٌ، قَالَ كُنَّا مَعَ النَّبِيِّ صلى الله عليه وسلم إِذْ مَرَّتْ بِنَا جَنَازَةٌ فَقَامَ لَهَا فَلَمَّا ذَهَبْنَا لِنَحْمِلَ إِذَا هِيَ جَنَازَةُ يَهُودِيٍّ فَقُلْنَا يَا رَسُولَ اللَّهِ إِنَّمَا هِيَ جَنَازَةُ يَهُودِيٍّ . فَقَالَ " إِنَّ الْمَوْتَ فَزَعٌ فَإِذَا رَأَيْتُمْ جَنَازَةً فَقُومُوا " .
sunnah.com