Ar-Rahman 55:7
The verse sets two acts in a single breath: "He raised the sky" and "He placed the balance." Two verses later, with the warning "do not transgress in the balance," the same word — mīzān — passes into human hands.
وَٱلسَّمَآءَ رَفَعَهَا وَوَضَعَ ٱلْمِيزَانَ
And the sky, He raised; and He set up the balance
Ar-Rahman 55:7 · Translation: talal-itani
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Cosmic order and moral weight are set on the two shores of a single word. The verse is the classical instance of how the passage from cosmology to ethics is made seamlessly within language.
Observation
In classical tafsīr "mīzān" is explained with both the sense of scale/weighing and of order/measure. This many-sidedness can be observed again in modern ecology: living systems — atmospheric composition, ocean pH, food chain, carbon cycle — stand on balances set at narrow margins; a small deviation sets the chain either to restore itself or to break. The verse's second call — "maintain the just scale, do not diminish the balance" — indicates that this balance is not a condition left to nature alone, but a trust asked to be maintained or broken by human hands.
Exegesis
Classical exegetes note that "mīzān" can be read in three senses at once: (1) the concrete scale used in trade; (2) the principle of justice; (3) the measure and balance within nature itself. Elmalılı Hamdi Yazır (Hak Dini Kur'an Dili) especially draws attention to all three senses being interlaced in the single word of the verse: the scale in the marketplace, justice in the court, the raising of the sky — all are different-scale faces of the same principle.
Sources
Tafsīr: Elmalılı Hamdi Yazır · Hak Dini Kur'an Dili; al-Zamakhsharī · al-Kashshāf. Science: ecology and systems science — standard literature on biosphere balances, atmospheric and ocean chemistry.