إِنَّمَا أَمْرُهُ إِذَا أَرَادَ شَيْئًا أَنْ يَقُولَ لَهُ كُنْ فَيَكُونُ. (Yā Sīn 36:82)
When He intends something, His command is only to say to it, “Be,” and it comes to be.
Kun (“Be”) expresses the effectiveness of Allah’s will and command: what He intends occurs according to that command.
The command also includes the appointed time and period in which the intended event is to occur.