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Mu`adh used to pray with the Prophet (ﷺ) and then go and lead his people (tribe) in the prayer.

Mu'adh b. Jabal said the night prayer with the Messenger of Allah (ﷺ) and then returned to his people and then led them in this prayer.

Mu'adh said the night prayer with the Messenger of Allah (ﷺ). He then came to the mosque of his people and led them in prayer.

Ibn 'Abbas reported that the Messenger of Allah (ﷺ) observed in Medina seven (rak'ahs) and eight (rak'ahs), i. e. (be combined) the noon and afternoon prayers (eight rak'ahs) and the sunset and 'Isha' prayers (seven rak'ahs).

So and so, have you prayed (two rak'ahs)? He said: No. He (the Prophet) said: Then stand and pray.

Mu’adh b. Jabal would pray along with the Messenger of Allah (ﷺ)in the night prayer, then go and lead his people and lead them in the same prayer.