Salus populi suprema lex esto (Latin: "The health (welfare, good, salvation, felicity) of the people should be the supreme law", "Let the good (or safety) of the people be the supreme (or highest) law", or "The welfare of the people shall be the supreme law") is a maxim or principle found in Cicero's "De Legibus" (book III, part III, sub. VIII).
Salus populi suprema lex esto is translated  "Let the good (or safety) of the people be the supreme (or highest) standard"