When I taught Freshman English as a grad student,

[sanatanadharma]

8. To do onto others sufficiently is to do onto self successfully

"Desire not the results of today's actions (karmas) that of their own nature will manifest reactions (karma phala), equal to the bad (and good) done."

Take therefore no thought the results of today's actions, thought for the things of itself (nature of things) will manifest reactions (the morrow), sufficient (equal) to the evil done today.

Bhagavad Gita 2:47 (variously translated from Sanskrit)

You have a right to perform your prescribed duties, but you are not entitled to the fruits of your actions. Never consider yourself to be the cause of the results of your activities, nor be attached to inaction.

You only have authority over action, not ever to the result. Don’t be motivated by the result, and don’t get attached to inaction.

You have the right to work only but never to its fruits. Let not the fruits of action be your motive, nor let your attachment be to inaction.

Your right is to perform your work, but never to the results. Never be motivated by the results of your actions, nor should you be attached to not performing your prescribed duties.