Mishkat al-Masabih 5 Funerals كتاب الجنائز 124

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»

Jabir said that when a funeral passed by God’s messenger stood up [to show respect] 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.)