Justice and judgement
Al-Muqsiṭ ٱلْمُقْسِط
The Equitable: the One who establishes justice and loves those who act justly.
Reported in the list of ninety-nine · root ق س ط
Why Allah uses this name
The Qurʾān states that He stands with justice and that He loves the equitable, so the name is both a description and a command to imitate within your means.
Take this with you
Be just where you have any authority — over a class, a family, a queue.
'Allah bears witness that there is no deity except Him, and the angels and those of knowledge — maintaining it in justice (qāʾiman bil-)' (3:18).
Qurʾān 3:18; the name itself listed in Sunan al-Tirmidhī 3507 (the enumeration of the ninety-nine names)
Where it appears in the Qur'an
This name is reported in the list of ninety-nine, but the Qur'an says it as a verb or a phrase rather than as this single word, so there is no word-for-word occurrence to list. The reasoning above cites the āyāt it is taken from.
Names close to this one
Al-Ḥakam ٱلْحَكَم
The Judge: the One whose ruling settles a matter finally and justly.
Al-ʿAdl ٱلْعَدْل
The Utterly Just: justice itself, so that no wrong of any weight can come from Him.
Al-Ḥasīb ٱلْحَسِيب
The Reckoner who is also the Sufficient: He takes account, and He is enough.
Al-Muntaqim ٱلْمُنتَقِم
The Avenger: the One who exacts retribution from the guilty who persist after warning.
Al-Jāmiʿ ٱلْجَامِع
The Gatherer: the One who will assemble all people on a Day about which there is no doubt.