الَّذِينَ يُقِيمُونَ الصَّلَاةَ وَيُؤْتُونَ الزَّكَاةَ وَهُم بِالْآخِرَةِ هُمْ يُوقِنُونَ
who maintain the prayer, pay the zakat, and are certain of the Hereafter.
Agha Ali Puya Commentary
Commentary on Quran 31:4
[Pooya/Ali Commentary 31:4] (see commentary for verse 2)