Let none deceive another, nor look down on anyone anywhere. Though provoked or aggrieved, let them not wish pain on each other.
Na paro paraṁ nikubbetha, Nātimaññetha katthaci na kañci; Byārosanā paṭighasañña, Nāññamaññassa dukkhamiccheyya.
Sutta Nipata 1.8
The same idea in other traditions
Blessed are the meek: for they shall inherit the earth.
When pride cometh, then cometh shame; But with the lowly is wisdom.
By doing service he acquires the Karman which brings about for him the nâman and gôtra of a Tîrthakara.
Call everyone exalted; no one seems lowly. The One Lord has fashioned the vessels, and His One Light pervades the three worlds.
Kind words and the covering of faults are better than charity followed by injury. Allah is free of all wants, and He is Most-Forbearing.
Fan Ch'ih asked about benevolence. The Master said, "It is to love all men." He asked about knowledge. The Master said, "It is to know all men." …
Lay not reproach at the drunkard’s door / Oh Fanatic, thou that art pure of soul; / Not thine on the page of life to enrol / The faults of others! Or less or more / I have swerved from my path—keep thou to thine own! / For every man when he reaches the goal / Shall reap the harvest his hands have sown. …