There are Ten Commandments in the Hebrew Bible. but people often add others, usually in jest.  A political Eleventh Commandment in the 1880s was “Thou shalt not get caught.” A political Eleventh Commandment from the 1960s is “Thou shalt not speak ill of another Republican.”
 
“Mind your business” was a popular business proverb in the 1700s. “Mind Your Business” was printed on the Fugio Cent design in 1787.
 
“Every man mind his own business” was called the Eleventh Commandment in 1819. “Mind your business” (or “mind your own business”) was cited in the 1840s as the Eleventh Amendment.
     
 
Wikipedia: Ten Commandments
The Ten Commandments, also known as the Decalogue, are a set of biblical principles relating to ethics and worship, which play a fundamental role in Judaism, Christianity, and Islam. The commandments include instructions to worship only God, to honour one’s parents, and to keep the sabbath, as well as prohibitions against idolatry, blasphemy, murder, adultery, theft, dishonesty, and coveting. Different religious groups follow different traditions for interpreting and numbering them.
 
The Ten Commandments are listed twice in the Hebrew Bible, first at Exodus 20:1–17, and then at Deuteronomy 5:6–21.
         
29 June 1819, Mississippi Free Trader (Natchez, MS), pg. 2, col. 4:
I often amuse myself by contemplating the vanity of a certain class of the human family who are more disposed to inquire in the calamities of others than to attend strictly to the eleventh commandment, i e, “Every man mind his own business.”
(...)
OTOPOSAW.
 
31 March 1927, Western Sun and General Advertiser (Vincennes, IN), pg. 2, col. 1:
Natchitoches, Feb. 20. Texes—(...) If they get clear, we would recommend them to live hereafter up to the (so called) eleventh commandment, i. e.—“every man mind his own business,” or at least, not to go among their neighbors, to “kick up the dust.”
 
Old Fulton NY Post Cards
13 September 1842, The Abolitionist (Cazenovia, NY), “Source of Opposition to Anti-Slavery,” pg. 206, col. 5:
Infidels and wicked men are very anxious to have ministers regard one of their commandments—the term it the eleventh commandment—“to mind their own business.” They are willing they should preach the gospel, but they must “mind their own business.”
 
25 August 1845, The Republican Compiler (Gettysburg, PA), pg. 3, col. 5:
The eleventh commandment is recommended to the special regard of the Editor of the ‘Star,” viz: ‘Mind your own business.’
 
28 November 1845, New York (NY) Herald, pg. 4, col. 3:
PHILADELPHIA, November 27, 1845.
Thanksgiving Day—Conviction of Pickpockets—Attorney Generals Kelley and Wharton—Philadelphia Grand—Eleventh Commandment—“Mind your Business.”
(...)
It would do them good, and they would learn, that if instead of getting into a fuss about what other people are doing, they were to attend to what has been called the 11th commandment, to wit—“mind your own business,” they would be much better off at the end of the year.
 
7 January 1846, Cincinnati (OH) Weekly Herald and Philanthropist, pg. 1, col. 4:
“Mind your own Business.”
“This is the Eleventh Commandment, and the State of Alabama has resolved to enforce it.” (...)—Public Ledger.
 
16 February 1848, Rockford (IL) Forum, pg. 2, col. 3:
Sermon by Burrows, Jr.—No. III.
On the Eleventh Commandment, id est.—“Mind your own business.”
 
3 November 1853, The National Era (Washington, DC), pg. 174, col. 5:
THE ELEVENTH COMMANDMENT.
The national Intelligencer is so in love with the eleventh commandment, “mind your own business,” that it is “tempted to wish that it had been incorporated into the decalogue!”
 
25 December 1879, Belmont Chronicle (Saint Clairsville, OH), “Gifts Without Money,” pg. 2, col. 2:
Old Andrew Jackson’s “eleventh commandment,” to “mind your own business,” is practiced by most well-bred Americans more rigorously than all the others.
 
Old Fulton NY Post Cards
The Knickerbocker News (Albany, NY), “New Book Reviews” edited by A. Ranger Tyler, pg. A-9, col. 1:
THE ELEVENTH COMMANDMENT, by George M. Closs Jr. Char;es Scribners Sons. $2.50
(...)
His text is borrowed from the Rev. Henry Darlington of New York City, who asserted that the “Eleventh Commandment” is “mind your own business.”
     
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“The 11th Commandment: Mind your own business.” -unknown
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The Eleventh Commandment: Mind your business
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