﴿ خُذْ مِنْ أَمْوَٰلِهِمْ صَدَقَةًۭ تُطَهِّرُهُمْ وَتُزَكِّيهِم بِهَا وَصَلِّ عَلَيْهِمْ ۖ إِنَّ صَلَوٰتَكَ سَكَنٌۭ لَّهُمْ ۗ وَٱللَّهُ سَمِيعٌ عَلِيمٌ ﴾

“[Hence, O Prophet,] accept that [part] of their possessions which is offered for the sake of God, so that thou mayest cleanse them thereby and cause them to grow in purity, and pray for them: behold, thy prayer will be [a source of] comfort to them-for God is all-hearing, all-knowing.”

Take of their wealth some alms to purify them and to cleanse them thereby of their sins; he thus took a third of their wealth and gave it away as charity; and pray for them that is supplicate for them; truly your prayers are a comfort a mercy for them it is also said to mean reassurance for them that their repentance has been accepted. And God is Hearer Knower.