Answer:
Commas indicate a natural pause in the sentence.
The Judiciary Act of 1789 made allocated Six justices to the Supreme Court. This six judge system lasted until 1807. At this time, Congress increased the number to seven. In 1837, the number of Supreme Court justices was then increased to nine. The amount of judges would change several more times before it was officially decided that this branch would have nine judges (like it does today).
Muslims believe that Islam is the complete and universal version of a primordial faith that was revealed many times before through prophets including Adam, Abraham, Moses and Jesus. Muslims consider the Quran to be the unaltered and final revelation of God.