Article 1, Section 9, Clause 8
Document 3
Virginia Declaration of Rights, sec. 4
12 June 17764. That no man, or set of men, are entitled to exclusive or separate emoluments or privileges from the community, but in consideration of publick services; which, not being descendible, neither ought the offices of magistrate, legislator, or judge, to be hereditary.
The Founders' Constitution
Volume 3, Article 1, Section 9, Clause 8, Document 3
http://press-pubs.uchicago.edu/founders/documents/a1_9_8s3.html
The University of Chicago Press