Except [We have left it with you] as a mercy from your Lord. Indeed, His favor upon you has ever been great.
The Saheeh International Quran Translation
إِلَّا رَحْمَةً مِّن رَّبِّكَ إِنَّ فَضْلَهُۥ كَانَ عَلَيْكَ كَبِيرًاExcept [We have left it with you] as a mercy from your Lord. Indeed, His favor upon you has ever been great.