"And to Allah belongs the unseen of the heavens and the earth," meaning: none knows it except Him. "And to Him the matter will be returned, all of it," on the Day of Resurrection.
"So worship Him and rely upon Him, and your Lord is not unaware of what you do."
﴿وَللَّه غيب السَّمَوَات وَالْأَرْض﴾ أَيْ: لَا يَعْلَمُهُ إِلا هُوَ ﴿وَإِلَيْهِ يرجع الْأَمر كُله﴾ يَوْمَ الْقِيَامَةِ.
﴿فَاعْبُدْهُ وَتَوَكَّلْ عَلَيْهِ وَمَا رَبُّكَ بِغَافِلٍ عَمَّا تَعْمَلُونَ﴾.