A major sin does not expel a believer from faith when it is not itself an act of unbelief.
This ruling concerns the person who still affirms the prohibition but disobeys through appetite, anger, negligence, or weakness. Such a person differs from someone who denies an established ruling or knowingly treats what is categorically forbidden as lawful. In the Sunni framework a major sinner may be fāsiq—a seriously disobedient believer—without automatically becoming an unbeliever.
Opening interactive controls...
Minor and Major Sins, Faith, and the Status of a Major Sinner
A major sin does not expel a believer from faith when it is not itself an act of unbelief.
This ruling concerns the person who still affirms the prohibition but disobeys through appetite, anger, negligence, or weakness. Such a person differs from someone who denies an established ruling or knowingly treats what is categorically forbidden as lawful. In the Sunni framework a major sinner may be fāsiq—a seriously disobedient believer—without automatically becoming an unbeliever.