Jabir said that Muadh b. Jabal would pray along with the Prophet, then go to his people and lead them in prayer. (Bukhari and Muslim.)

عَنْ جَابِرٍ قَالَ: كَانَ مُعَاذُ بْنُ جَبَلٍ يُصَلِّي مَعَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ثُمَّ يَأْتِي قومه فَيصَلي بهم