The word(s) "treat" appears 29 time(s) in 26 verse(s) in Quran in Mohsin Khan translation.

(21) When they entered in upon Dawud (David), he was terrified of them. They said: "Fear not! (We are) two litigants, one of whom has wronged the other, therefore judge between us with truth, and treat us not with injustice, and guide us to the Right Way.

(22) Shall We treat those who believe (in the Oneness of Allah - Islamic Monotheism) and do righteous good deeds as Mufsidun (those who associate partners in worship with Allah and commit crimes) on earth? Or shall We treat the Muttaqun (the pious - See V.2:2) as the Fujjar (criminals, disbelievers, the wicked)?

(23) The good deed and the evil deed cannot be equal. Repel (the evil) with one which is better (i.e. Allah orders the faithful believers to be patient at the time of anger, and to excuse those who treat them badly) then verily he, between whom and you there was enmity, (will become) as though he was a close friend.

(24) Shall We then treat the Muslims (believers of Islamic Monotheism, doers of righteous deeds) like the Mujrimun (criminals, polytheists and disbelievers, etc.)?

(25) Nay! But you treat not the orphans with kindness and generosity (i.e. you neither treat them well, nor give them their exact right of inheritance)!

(26) Therefore, treat not the orphan with oppression.