Allah's sovereignty and uniqueness

فَلَمَّآ أَتَىٰهَا نُودِىَ مِن شَـٰطِئِ ٱلْوَادِ ٱلْأَيْمَنِ فِى ٱلْبُقْعَةِ ٱلْمُبَـٰرَكَةِ مِنَ ٱلشَّجَرَةِ أَن يَـٰمُوسَىٰٓ إِنِّىٓ أَنَا ٱللَّهُ رَبُّ ٱلْعَـٰلَمِينَ

But when he came to it, he was called from the right side of the valley in a blessed spot - from the tree, "O Moses, indeed I am Allāh, Lord of the worlds."