His command is only when He intends a thing that He says to it, "Be," and it is.
The Saheeh International Quran Translation
إِنَّمَآ أَمْرُهُۥٓ إِذَآ أَرَادَ شَيْـًٔا أَن يَقُولَ لَهُۥ كُن فَيَكُونُHis command is only when He intends a thing that He says to it, "Be," and it is.