“He will punish all the evil deeds of men, although they have not been prohibited by a prophet, if common sense warns against them, as e. g., injustice and violence. …it is distinctly added that he who does a good thing without being commanded, receives nevertheless his reward. The same principle is expressed in all the sayings of our Sages.”

Chi non punisce il male comanda che si faccia.
The Notebooks of Leonardo da Vinci (1883), XIX Philosophical Maxims. Morals. Polemics and Speculations.
Variant: He who does not punish evil commands it to be done.

And further, one should think: "This leads to happiness in this world and the next."
Edicts of Ashoka (c. 257 BC)

Twitter post https://twitter.com/McCormickProf/status/954009052090175489 (18 January 2018)
2018

As quoted in "Pope at Mass: Culture of encounter is the foundation of peace" at Vatican Radio (22 May 2013) http://en.radiovaticana.va/news/2013/05/22/pope_at_mass:_culture_of_encounter_is_the_foundation_of_peace/en1-694445
2010s, 2013
Context: The Lord created us in His image and likeness, and we are the image of the Lord, and He does good and all of us have this commandment at heart: do good and do not do evil. All of us. "But, Father, this is not Catholic! He cannot do good." Yes, he can. He must. Not can: must! Because he has this commandment within him. Instead, this "closing off" that imagines that those outside, everyone, cannot do good is a wall that leads to war and also to what some people throughout history have conceived of: killing in the name of God. That we can kill in the name of God. And that, simply, is blasphemy. To say that you can kill in the name of God is blasphemy.

1950s, Loving Your Enemies (Christmas 1957)
Context: Second we must recognize that the evil deed of the enemy-neighbor, the thing that hurts, never quite expresses all that he is. An element of goodness may be found even in our worst enemy. Each of us is something of a schizophrenic personality, tragically divided against ourselves. A persistent civil war rages within all or our lives. Something within us causes us to lament with Ovid, the Latin poet, "I see and approve the better things, but follow the worse," or to agree with Plato that human personality is like a charioteer having two headstrong horses, each wanting to be go in a different direction, or to repeat with the Apostle Paul, "The good that I would I do not, but the evil which I would not, I do."

Source: Patriotism and Christianity http://en.wikisource.org/wiki/Patriotism_and_Christianity (1896), Ch. 17
Context: One free man will say with truth what he thinks and feels amongst thousands of men who by their acts and words attest exactly the opposite. It would seem that he who sincerely expressed his thought must remain alone, whereas it generally happens that every one else, or the majority at least, have been thinking and feeling the same things but without expressing them.
And that which yesterday was the novel opinion of one man, to-day becomes the general opinion of the majority.
And as soon as this opinion is established, immediately by imperceptible degrees, but beyond power of frustration, the conduct of mankind begins to alter.
Whereas at present, every man, even, if free, asks himself, "What can I do alone against all this ocean of evil and deceit which overwhelms us? Why should I express my opinion? Why indeed possess one? It is better not to reflect on these misty and involved questions. Perhaps these contradictions are an inevitable condition of our existence. And why should I struggle alone with all the evil in the world? Is it not better to go with the stream which carries me along? If anything can be done, it must be done not alone but in company with others."
And leaving the most powerful of weapons — thought and its expression — which move the world, each man employs the weapon of social activity, not noticing that every social activity is based on the very foundations against which he is bound to fight, and that upon entering the social activity which exists in our world every man is obliged, if only in part, to deviate from the truth and to make concessions which destroy the force of the powerful weapon which should assist him in the struggle. It is as if a man, who was given a blade so marvelously keen that it would sever anything, should use its edge for driving in nails.
We all complain of the senseless order of life, which is at variance with our being, and yet we refuse to use the unique and powerful weapon within our hands — the consciousness of truth and its expression; but on the contrary, under the pretext of struggling with evil, we destroy the weapon, and sacrifice it to the exigencies of an imaginary conflict'.

Tafsir

Upon the Sovereign Sun (362)
Context: The same things, therefore, does the Sun communicate to things intelligible, over whom he was appointed by the Good to reign and to command: although these were created and began to exist at the same moment with himself.

Narrated Abu Huraira, in Bukhari, Volume 4, Book 52, Number 44
Sunni Hadith