2 verses have
مِثْقَالَ
in Edition Uthmani / Az-Zalzala (The Earthquake)

7:99فَمَن يَعْمَلْ مِثْقَالَ ذَرَّةٍ خَيْرًۭا يَرَهُۥ

8:99وَمَن يَعْمَلْ مِثْقَالَ ذَرَّةٍۢ شَرًّۭا يَرَهُۥ