Muslim Brotherhood leader Mohamed El-Beltagy has accused the US, Zionists and Gulf states of trying to ruin Egypt's democratic process.
El-Beltagy, secretary-general of the group’s Freedom and Justice Party (FJP), said people who seek support from Western countries are misled.
“The people are the best judges,” he added. “A revolt against the legitimate authorities will produce thousands of martyrs.”
People who say the constitution was rushed are “liars,” he said.
The Islamist leader was speaking during a press conference in the 10th of Ramadan suburb of Cairo.
Critics have accused the Islamist-led Constituent Assembly of rushing to finish the constitution after it held a 14-hour voting session on 30 November and presented the completed document to President Mohamed Morsi the next day.
El-Beltagy rejected the accusation, saying the assembly had looked at 70,000 recommendations and dealt with over 1.5 million amendments to the 236-article draft charter.
The draft stipulates that disabled and unemployed people will get social security payments and contains a minimum and maximum wage for workers, he added.
Article 80 of the constitution criminalises the violation any freedom covered by the constitution, he concluded.