مِن

إِنَّكَ لَمِنَ ٱلْمُرْسَلِينَ

Indeed you, [O Muḥammad], are from among the messengers,

وَمِن دُونِهِمَا جَنَّتَانِ

And below them both [in excellence] are two [other] gardens -

ثُلَّةٌۭ مِّنَ ٱلْأَوَّلِينَ

A [large] company of the former peoples