Wiktionary
do unto others
vb. To obey the golden rule: to treat others as one would wish to be treated.
Wikipedia
Do Unto Others (film)
Do Unto Others is a 1915 British silent drama film directed by Bert Haldane and starring Thomas H. MacDonald, Peggy Richards and Patrick J. Noonan.
Usage examples of "do unto others".
In other words, what you do unto others will be done unto you, whether by thought, deed or action.