The Code of the Sith, known as Qotsisajak in Sith, was the mantra that reinforced the core beliefs of the Sith Order. It was considered the dark side counterpart to the Jedi Code, and was first authored on the planetKorriban in 6900 BBY by the Jedi heretic Sorzus Syn. The code remained remarkably unchanged through the millennia, as the Sith Lord Darth Bane still taught the words of Sorzus Syn when he began rebuilding the Sith Order around 1000 BBY, after the Seventh Battle of Ruusan.