• أَسَّسَ
• أُسِّسَ

Appears 2 times in the Quran.

1. 9:108 لَا تَقُمْ فِيهِ أَبَدًا لَّمَسْجِدٌ أُسِّسَ عَلَى ٱلتَّقْوَىٰ مِنْ أَوَّلِ يَوْمٍ أَحَقُّ أَن تَقُومَ فِيهِ فِيهِ رِجَالٌ يُحِبُّونَ أَن يَتَطَهَّرُوا۟ وَٱللَّهُ يُحِبُّ ٱلْمُطَّهِّرِينَ

   Never stand in it; certainly a masjid founded on piety from the very first day is more deserving that you should stand in it; in it are men who love that they should be purified; and Allah loves those who purify themselves.
   

2. 9:109 أَفَمَنْ أَسَّسَ بُنْيَٰنَهُۥ عَلَىٰ تَقْوَىٰ مِنَ ٱللَّهِ وَرِضْوَٰنٍ خَيْرٌ أَم مَّنْ أَسَّسَ بُنْيَٰنَهُۥ عَلَىٰ شَفَا جُرُفٍ هَارٍ فَٱنْهَارَ بِهِۦ فِى نَارِ جَهَنَّمَ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلظَّٰلِمِينَ

   Is he, therefore, better who lays his foundation on fear of Allah and (His) good pleasure, or he who lays his foundation on the edge of a cracking hollowed bank, so it broke down with him into the fire of hell; and Allah does not guide the unjust people.