ذِى قُوَّةٍ عِندَ ذِى ٱلْعَرْشِ مَكِينٍ ۝٢٠ Why is the second ذِى in عِندَ ذِى ٱلْعَرْشِ marked with yāʾ?

Surah At-Takwir — Part 3