The Association of Muslim Scholars issued the fatwa, or religious decree, late yesterday "prohibiting (Egyptians from) responding to any call leading to civil war or covering up (the army's actions) of violence against any party, or inciting sedition".
Egypt's army chief General Abdel Fattah al-Sisi yesterday called for mass rallies tomorrow to support a security force crackdown on "terrorism and violence".
With tensions already running high three weeks after the military ousted president Mohamed Morsi, Sisi's call for demonstrations raises the prospect of further deadly violence.
Qaradawi's Doha-based Sunni association urged "all Egyptians -- people, parties, army and police -- to preserve their country's security and prevent all that could lead to a civil war in which all sides will be losers".
Also Read
It also urged other countries to come up with "an urgent initiative to resolve this dangerous crisis that threatens the security of Egypt as well as the Arab and Muslim world".
The 86-year-old cleric is a regular commentator on Doha-based Al-Jazeera satellite television and has millions of supporters across the Arab world.