U.S. ConstitutionArticle I — The Legislative BranchSubarticle 3Section 3
No Person shall be a Senator who shall not have attained to the Age of thirty Years, and been nine Years a Citizen of the United States, and who shall not, when elected, be an Inhabitant of that State for which he shall be chosen.
Use as reference
Lexinter.net | U.S. Const. art. I, § 3, cl. 3 | https://laws.lexinter.net/constitution/us/article-1/section-3/clause-3