Systems are mentioned in the Quran in these verses:
[2:138] Such is God’s system, and whose system is better than God’s? “Him alone we worship.”
[3:175] It is the devil’s system to instill fear into his subjects. Do not fear them and fear Me instead, if you are believers.
[6:34] Messengers before you have been rejected, and they steadfastly persevered in the face of rejection. They were persecuted until our victory came to them. Such is God’s system that will never change. The history of My messengers thus sets the precedents for you.
[15:13] Consequently, they cannot believe in him. This has been the system since the past generations.
[15:75] This is a lesson for those who possess intelligence.
[15:76] This will always be the system.
[17:12] We rendered the night and the day two signs. We made the night dark, and the day lighted, that you may seek provisions from your Lord therein. This also establishes for you a timing system, and the means of calculation. We thus explain everything in detail.
[17:77] This has been consistently the case with all the messengers that we sent before you, and you will find that our system never changes.
[33:38] The prophet is not committing an error by doing anything that is made lawful by God. Such is God’s system since the early generations. God’s command is a sacred duty.
[33:62] This is God’s eternal system, and you will find that God’s system is unchangeable.
[35:43] They resorted to arrogance on earth, and evil scheming, and the evil schemes only backfire on those who scheme them. Should they then expect anything but the fate of those who did the same things in the past? You will find that God’s system is never changeable; you will find that God’s system is immutable.
[40:85] Their belief then could not help them in the least, once they saw our retribution. Such is God’s system that has been established to deal with His creatures; the disbelievers are always doomed.
[48:23] Such is God’s system throughout history, and you will find that God’s system is unchangeable.
To learn more, read the Quran in English.
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