ENOfficial
Abu Sa'id told that God's messenger mentioned the one who Would blow the trumpet, saying that Gabriel would be at his right hand and Michael at his left.
Source: sunnah.com
Other translations
Arabic
وَعَنْ أَبِي سَعِيدٍ قَالَ: ذَكَرَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ صَاحِبُ الصُّورِ وَقَالَ: «عَن يَمِينه جِبْرِيل عَن يسَاره مِيكَائِيل»
sunnah.com