Sa'id bin Abi 'Aruba سعيد بن أبي عروبة · Chapters Regarding Funerals

It was narrated from ‘Uthman bin ‘Affan that the Prophet (ﷺ) offered the funeral prayer for ‘Uthman bin Maz’un, and he said four Takbir over him.

“They (the martyrs) were brought to the Messenger of Allah (ﷺ) on the Day of Uhud, and he started to offer the funeral prayer for them, ten by ten. Hamzah lay where he lay, and they were taken away but he was left where he was.”