Texas Code of Criminal Procedure - CRIM P Art. § 45A.156. Jury Summoned

(a) If a defendant does not waive a trial by jury, the justice or judge shall issue a writ commanding the proper officer to summon a venire from which six qualified persons shall be selected to serve as jurors in the case.

(b) Jurors summoned as provided by Subsection (a) shall remain in attendance, as jurors in all cases that may come up for hearing, until discharged by the justice or municipal court.

(c) A person summoned as provided by Subsection (a) who fails to attend may be fined an amount not to exceed $100 for contempt.

(d) If a sufficient number of jurors are not in attendance as a result of challenges or any other reason, the justice or judge shall order the proper officer to summon a sufficient number of qualified persons to form the jury.