• سُعِدُوا۟
• سَعِيد

Appears 2 times in the Quran.

1. 11:105 يَوْمَ يَأْتِ لَا تَكَلَّمُ نَفْسٌ إِلَّا بِإِذْنِهِۦ فَمِنْهُمْ شَقِىٌّ وَسَعِيدٌ

   On the day when it shall come, no soul shall speak except with His permission, then (some) of them shall be unhappy and (others) happy.
   

2. 11:108 وَأَمَّا ٱلَّذِينَ سُعِدُوا۟ فَفِى ٱلْجَنَّةِ خَٰلِدِينَ فِيهَا مَا دَامَتِ ٱلسَّمَٰوَٰتُ وَٱلْأَرْضُ إِلَّا مَا شَآءَ رَبُّكَ عَطَآءً غَيْرَ مَجْذُوذٍ

   And as to those who are made happy, they shall be in the garden, abiding in it as long as the heavens and the earth endure, except as your Lord please; a gift which shall never be cut off.