It was narrated from ‘Umar that the Messenger of Allah ﷺ said:
‘Season (your food) with olive oil and anoint yourselves with it, for it comes from a blessed tree.”

حَدَّثَنَا الْحُسَيْنُ بْنُ مَهْدِيٍّ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَنْبَأَنَا مَعْمَرٌ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ أَبِيهِ، عَنْ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ ـ ﷺ ـ " اِئْتَدِمُوا بِالزَّيْتِ وَادَّهِنُوا بِهِ فَإِنَّهُ مِنْ شَجَرَةٍ مُبَارَكَةٍ " .