The Sharia Association of Rights and Reform has called for a million-man protest next Friday against recent calls for having Supra-constitution principles.
The association is made up of around 100 members from different Islamic groups. including Azhar clerics and Salafi sheikhs.
The commission is against the supra principles idea, saying the proposals go against the public's right to elect whoever will represent them, whether in parliament or in the writing of a constitution.
It also stated that the Islamic Sharia is the majority choice for Egypt, accusing secularists and liberals of trying to outflank the true preferences of the Egyptian people.
The commission has proposed a constitution based on Islamic law, prepared by the Islamic research committee in 1978, be discussed publicly with constitution and law experts.