Jami` at-Tirmidhi Book 25, Hadith 67

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.

Previous Hadith

"I saw the Messenger of Allah (ﷺ) taking from the sides around the dish - meaning the gourd. Since then I still like it."

This Hadith is Hasan Sahih. This Hadith has been reported through more than one route from Anas bin Malik.

Jami` at-Tirmidhi Book 25, Hadith 66
Next Hadith

Another chain from Zaid bin Aslam, from his father, from the Prophet (ﷺ) with similar. And he did not mention "from 'Umar" in it.

Jami` at-Tirmidhi Book 25, Hadith 68