Tex. Const. art. III, § 11
Each House may determine the rules of its own proceedings, punish members for disorderly conduct, and, with the consent of two-thirds, expel a member, but not a second time for the same offence†.
(Feb. 15, 1876.)
† The language of this provision is identical to the language of the official legislative measure that originally proposed the provision. A digital image of the original text of the official enrolled measure can be found here.