Christian canon law rarely invoked Muslim law as a legal precedent

Evidence

This is the unique example, as far as I know, of a Christian legal text specifically invoking Muslim law as a legal precedent for the treatment of non-Christians. — John V. Tolan, Saracens, 990

Categorization

• QUESTION: Which Christian legal text invoked Muslim dhimma law, and where? Worth chasing the specific source.
• XREF: connects to: Canon law allowed rare family contact with converts to Islam