"Except for those who believe and do righteous deeds, for them is a reward," meaning a recompense, which is Paradise, "unlimited," interpreted by al-Hasan as: not bestowed upon them as a favor that causes offense.
﴿إِلا الَّذِينَ آمَنُوا وَعَمِلُوا الصَّالِحَاتِ لَهُم أجر﴾ ثَوَابٌ وَهِيَ الْجَنَّةُ ﴿غَيْرُ مَمْنُونٍ﴾ تَفْسِيرُ الْحَسَنِ: غَيْرُ مَمْنُونٍ عَلَيْهِمْ مَنَّ أَذًى.