The text states:
«ويكون الخبر حجة بشرائط في الراوي، وهي أربعة»
A report becomes legally authoritative subject to four conditions in the narrator.
These are:
1. ʿAql: rational competence.
2. Dabt: precise reception and preservation.
3. ʿAdalah: upright religious character.
4. Islam: the narrator’s Islamic faith.
They must be distinguished: ethical reliability does not alone establish accurate memory, and excellent recall does not by itself establish the narrator’s integrity.