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.

حَدَّثَنَا يَحْيَى بْنُ مُوسَى، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، عَنْ مَعْمَرٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ أَبِيهِ، عَنْ عُمَرَ بْنِ الْخَطَّابِ، قَالَ قَالَ رَسُولُ اللَّهِ ﷺ " كُلُوا الزَّيْتَ وَادَّهِنُوا بِهِ فَإِنَّهُ مِنْ شَجَرَةٍ مُبَارَكَةٍ " .

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ لاَ نَعْرِفُهُ إِلاَّ مِنْ حَدِيثِ عَبْدِ الرَّزَّاقِ عَنْ مَعْمَرٍ وَكَانَ عَبْدُ الرَّزَّاقِ يَضْطَرِبُ فِي رِوَايَةِ هَذَا الْحَدِيثِ فَرُبَّمَا ذَكَرَ فِيهِ عَنْ عُمَرَ عَنِ النَّبِيِّ ﷺ وَرُبَّمَا رَوَاهُ عَلَى الشَّكِّ فَقَالَ أَحْسَبُهُ عَنْ عُمَرَ عَنِ النَّبِيِّ ﷺ وَرُبَّمَا قَالَ عَنْ زَيْدِ بْنِ أَسْلَمَ عَنْ أَبِيهِ عَنِ النَّبِيِّ ﷺ مُرْسَلاً .