جامع الترمذي

Narrated 'Umar bin Al-Khattab:

That the Messenger of Allah (ﷺ) said: "Eat olive and use its oil, for indeed it is a blessed tree."

[Abu 'Eisa said:] We do not know of this Hadith except through the narration of 'Abdur-Razzaq from Ma'mar (narrators in the chain of this Hadith). 'Abdur-Razzaq would narrate this with Idtirab. Sometimes he mentioned in it: "From 'Umar, from the Prophet (ﷺ)" and sometimes he reported it indicating doubt, saying: "I think it is from 'Umar from the Prophet (ﷺ)." And sometimes he said: "From Zaid bin Aslam, from his father, from the Prophet (ﷺ)" in a Mursal form.