What does “fa-in lam yubayyin ajbarahu al-qadi ʿala al-bayan” mean?

Kitab al-Iqrar: Capacity, Unspecified Rights, and Amounts in Admissions

• The judge immediately confiscates the whole estate
• The judge compels the admitting party to clarify
• The judge accepts any claimant amount without proof
• If property is vague, the judge requires a new contract