Virginia constitution
Article IV: legislature
Section 4

No person holding a salaried office under the government of the Commonwealth, and no judge of any court, attorney for the Commonwealth, sheriff, treasurer, assessor of taxes, commissioner of the revenue, collector of taxes, or clerk of any court shall be a member of either house of the General Assembly during his continuance in office; and his qualification as a member shall vacate any such office held by him. No person holding any office or post of profit or emolument under the United States government, or who is in the employment of such government, shall be eligible to either house.