Allah (SwT) has said,

“Surely Allah enjoins the doing of justice and of good deeds (to others) and the giving to the kindred, and He forbids indecency, evil, and rebellion; He admonishes you so that you may be mindful” (Qur’an, 16:90).

‎’Adl means moderation; al-’adl is above oppressing or being inequitable to anyone in His decrees and actions. Rather, He grants everyone what is due to him; He puts everything in its right place; nothing ensues from Him except justice. He does whatever He pleases, and His decree regarding His servants is carried out.

In Surah al-An’am, the Almighty says,

“And the word of your Lord has been accomplished truly and justly; none can change His words, and He is the Hearing, the Knowing” (Qur’an, 6:115).

He enjoins justice and equity and says the following in Surah al-Nisa’ (Women):

“When you judge between people, you should judge with justice; surely Allah admonishes you with what is excellent; surely Allah is Seeing, Hearing” (Qur’an, 4:58).

There are many traditions narrated about the Messenger of Allah (S) pointing out to ‘adl and highlighting the status of those who act on it. One of them is his saying, “There are seven types of people whom Allah (SwT) will shade on a Day when there will be no shade except His: a just imam, a young man who grows up adoring Allah (SwT), a man whose heart is always attached to mosques, two men who love one another for the sake of Allah (SwT): They meet and they part only accordingly, a man sought by a woman of prominence and beauty [for illicit sex] and to whom he says, ‘I fear Allah (SwT),’ a man who pays charity and hides his action, so much so that his left hand does not know what his right hand gives away, and a man who mentions the Name of Allah (SwT) for the sake of remembering Him while his tears overflow. “ This tradition is recorded by al-Bukhari and Muslim and is quoted on pp. 164-165, Vol. 3, of Al-Targheeb wat Tarheeb, and on p. 30 of Qabasat min Hadi an nubuwwah.