purity of heart

إِلَّا مَنْ أَتَى ٱللَّهَ بِقَلْبٍ سَلِيمٍ

But only one who comes to Allāh with a sound heart."

وَٱلَّذِينَ جَآءُو مِنۢ بَعْدِهِمْ يَقُولُونَ رَبَّنَا ٱغْفِرْ لَنَا وَلِإِخْوَٰنِنَا ٱلَّذِينَ سَبَقُونَا بِٱلْإِيمَـٰنِ وَلَا تَجْعَلْ فِى قُلُوبِنَا غِلًّا لِّلَّذِينَ ءَامَنُوا۟ رَبَّنَآ إِنَّكَ رَءُوفٌ رَّحِيمٌ

And [there is a share for] those who come after them, saying, "Our Lord, forgive us and our brothers who preceded us in faith and put not in our hearts [any] resentment toward those who have believed. Our Lord, indeed You are Kind and Merciful."