Why did Allah SWT say if you make Sunnah and Fajr Salat that you will have khair all day long?

thanks ...for sharing ..jazakallah alkhier.... apart from hidden bounties ....just on the face of it ...it gives ...good results ....see chinese ...early sleep ...early risers ....how fast they progress .....before that ...too lazy ...lying on road side ...having opium.....with prayers ....it will definitely give good results....healty mind ...healthy Aurora [latest research