The ruling on one who prays Maghrib with a group who are praying 'Isha'

Question:
May Allah reward you. We will take a call from Abu Hani from al-Ta'if. Please, my brother Abu Hani. Peace be upon you, and Allah's mercy and blessings. And upon you be peace, and Allah's mercy and blessings. Some people are traveling from one city to another, and the time for the 'Isha' prayer arrived, but they had missed the Maghrib prayer. So he entered the prayer with the intention of Maghrib, and in the third rak'ah he said the taslim before the imam finished the prayer and left the prayer. Is this correct or incorrect?

Answer:
Yes, this is permissible. This is permissible according to the stronger position. If you entered the prayer with him with the intention of Maghrib, and then when you completed the three rak'ahs you sat for the final tashahhud, you have a choice: if you wish, you can say the taslim for yourself, and if you wish, you can wait for the imam and say the taslim with him. Yes.