It wasnarrated from 'Amir bin Rabi'ah that the Prophet (ﷺ) said:
"When you see a funeral (procession) stand up for it until it haspassed by or it is placed on the ground." (FR)
English reference (FR): Vol. 1, Book 6, Hadith 1542 (FR)
Arabic reference (FR): Book 6, Hadith 1609 (FR)