What is the ruling on breaking an oath made in writing online to harm oneself, and is expiation obligatory for it?
An oath is binding when written if the writer intends it to be so. The ruling concerning an oath made to commit a sin is that it is impermissible to act upon it. Rather, one must break the oath, and expiation becomes obligatory, as stated by Ibn Abi Zayd al-Maliki and al-Zayla'i.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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