Jami` at-Tirmidhi Book 25, Hadith 68
Another chain from Zaid bin Aslam, from his father, from the Prophet (ﷺ) with similar. And he did not mention "from 'Umar" in it.
That the Messenger of Allah (ﷺ) said: "Eat olive and use its oil, for indeed it is a blessed tree."
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.
"The Prophet (ﷺ) said: Eat of its oil and use it (the olives), for indeed it is from a blessed tree."
This Hadith is Gharib from this route. We only know of it from the narration of Sufyan At-Thawri, from 'Abdullah bin 'Eisa.