[Aa`raf 7:54] Indeed your Lord is Allah Who created the heavens and the earth in six days, then in the manner befitting His Majesty, ascended the Throne (of control); He covers the night with the day, which hastily follows it, and made the sun and the moon and the stars subservient to His command; pay heed! Only He has the power to create and command; Most Auspicious (Propitious) is Allah, the Lord Of The Creation.
Kun Fa ya Koon, If He(swt) says Kun for creation of Sky, it will be created in no time, but why is 6 days mentioned here? What is the understanding? Is this Ayath Mutheshabihaat?
Sunna of Allah is when His Command and Creation takes place within created confines such as time, whether infinitesimal such as boson particles or endless such as cosmic time, where’s Qudra of Allah is beyond that. Kun is a Manifestation of His Qudra, transcending or breaching the laws He created.
Hajj Gibril Haddad