﴿ وَهُوَ ٱلَّذِى فِى ٱلسَّمَآءِ إِلَٰهٌۭ وَفِى ٱلْأَرْضِ إِلَٰهٌۭ ۚ وَهُوَ ٱلْحَكِيمُ ٱلْعَلِيمُ ﴾

“for [then they will come to know that] it is He [alone] who is God in heaven and God on earth, and [that] He alone is truly wise, all-knowing.”

And He it is Who in the heaven is God fi’l-samā’i ilāhun pronounce here both hamzas or drop the first one or softening it into a yā’ in other words Who in the heaven is the Worshipped One and in the earth is God both adverbials are semantically connected to what follows; and He is the Wise in the management of His creatures the Knower of their welfare.