Standing for a funeral is a recommended practice
Machine translationRead the Arabic original
Q: If a Muslim is in the mosque and sees a funeral procession, does he stand?
A: The apparent meaning of the hadith is general, so it is recommended. If one leaves it, there is no blame on him; because standing for it is a recommended practice and not obligatory. The Messenger of Allah (peace and blessings be upon him) stood at one time and sat at another, which indicates that it is not obligatory. And success is from Allah, and may Allah send prayers and peace upon our Prophet Muhammad and his family and his Companions.
A: The apparent meaning of the hadith is general, so it is recommended. If one leaves it, there is no blame on him; because standing for it is a recommended practice and not obligatory. The Messenger of Allah (peace and blessings be upon him) stood at one time and sat at another, which indicates that it is not obligatory. And success is from Allah, and may Allah send prayers and peace upon our Prophet Muhammad and his family and his Companions.
Source
binbaz.org.sa
The Arabic text is copied verbatim from the original source, without any edits.