Medieval History of Thailand The law is based Phathammasat scripture. Phathammasat scripture Who is from India. According to the beliefs of Hinduism. The Bible is the law of justice that comes from India . The basis for the implementation of the general public as well as the king is under Phathammasat. When come in can be converted into a Bible in Buddhism. The equivalent of constitutional law. Ayutthaya kingdom that the king is responsible for the administration and jurisdiction according to Phathammasat.