And establish weight in justice and do not make deficient the balance. (55:9)

Almuntakhab Fi Tafsir Alquran Alkarim

But counterpoise and hold in equipoise all matters, concerns and affairs and that which exists individually, in fact or in idea, and that which is or may be in anyway an object of perception, knowledge, or thought, and do not de induced to act dishonestly with the balance, thus remains everything in the course and order wherein it was set at the creation

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(55:9) but weigh things equitably and skimp not in the balance. *8

And establish weight in justice and do not make deficient the balance. meaning

*8) That is, "As you are living in a balanced Universe, whose entire system has been established on justice, you also should adhere to justice. For if you act unjustly within the sphere in which you have been given authority, and fail to render the rights of others, you would indeed be rebelling against the nature of the Universe; for the nature of this Universe does not admit of injustice and perversion and violation of the rights. Not to speak of a major injustice, even if a person fraudulently deprives another of an ounce of something, by giving him short measure, he disturbs the balance of the entire Universe.-This is the second important part of the Qur'anic teaching that has been presented in these three verses. The first teaching is Tauhid and the second is justice. Thus, in a few brief sentences the people have been told what teaching has been brought by the Qur'an which the Merciful God has sent for the guidance of man."
 

And establish weight in justice and do not make deficient the balance. meaning in Urdu

انصاف کے ساتھ ٹھیک ٹھیک تولو اور ترازو میں ڈنڈی نہ مارو