ENOfficial
Abu Usaid al-Ansari reported God’s messenger as saying, “Eat olive oil and anoint yourselves with it, for it comes from a blessed tree.” Tirmidhi, Ibn Majah and Darimi transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَن أبي أُسَيدٍ الْأَنْصَارِيِّ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «كَلُوا الزَّيْتَ وَادَّهِنُوا بِهِ فَإِنَّهُ مِنْ شَجَرَةٍ مُبَارَكَةٍ» . رَوَاهُ التِّرْمِذِيُّ وَابْنُ مَاجَهْ وَالدَّارِمِيُّ
sunnah.com