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Jabir said that when a funeral passed by God’s messenger stood up and they stood up along with him. They told him it was a Jewish funeral and he replied, “Death is a fearful event, so when you see a funeral stand up.” (Bukhari and Muslim.)
Source: sunnah.com
Other translations
Arabic
وَعَنْ جَابِرٍ قَالَ: مَرَّتْ جَنَازَةٌ فَقَامَ لَهَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَقُمْنَا مَعَهُ فَقُلْنَا: يَا رَسُولَ اللَّهِ إِنَّهَا يَهُودِيَّةٌ فَقَالَ: «إِنَّ الْمَوْتَ فَزَعٌ فَإِذَا رَأَيْتُمْ الْجِنَازَة فَقومُوا»
sunnah.com