Texas cannot require public schools to display the Ten Commandments in every classroom, a judge said Wednesday in a temporary ruling against the state’s new requirement, making it the third such state law to be blocked by a court.

A group of Dallas-area families and faith leaders sought a preliminary injunction against the law, which goes into effect on Sept. 1. They say the requirement violates the First Amendment’s protections for the separation of church and state and the right to free religious exercise.

Texas is the largest state to attempt such a requirement, and U.S. District Judge Fred Biery’s ruling from San Antonio is the latest in a widening legal fight that’s expected to eventually go before the U.S. Supreme Court.