Verse 21

قَالَ كَذَٰلِكِ قَالَ رَبُّكِ هُوَ عَلَىَّ هَيِّنٌ وَلِنَجْعَلَهُۥٓ ءَايَةً لِّلنَّاسِ وَرَحْمَةً مِّنَّا وَكَانَ أَمْرًا مَّقْضِيًّا

He said; thus says your Lord, it is easy for Me and We will make him a sign for the people and a mercy from Us. And this matter is preordained.