ENOfficial
Ubayy b. Ka‘b said that when God’s messenger mentioned anyone for whom he made supplication, he began with himself. Tirmidhi transmitted it, saying this is a hasan gharib sahih tradition.
Source: sunnah.com
Other translations
Arabic
وَعَنْ أُبَيِّ بْنِ كَعْبٍ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا ذَكَرَ أَحَدًا فَدَعَا لَهُ بَدَأَ بِنَفْسِهِ رَوَاهُ التِّرْمِذِيُّ وَقَالَ هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ صَحِيح
sunnah.com