Hanafi position in this passage: wiping at least a quarter of the head is obligatory, supported by the forelock report.
Al-Shafi‘i: the explanation reports sufficiency of wiping a small part.
Malik: the explanation reports an obligation to wipe the whole head.
The dispute concerns the minimum legally required extent, not whether the head must be wiped.
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Juristic Views on the Extent of Wiping
Taharah and Wudu Obligations: Limits, Evidence and Juristic Differences
Hanafi position in this passage: wiping at least a quarter of the head is obligatory, supported by the forelock report.
Al-Shafi‘i: the explanation reports sufficiency of wiping a small part.
Malik: the explanation reports an obligation to wipe the whole head.
The dispute concerns the minimum legally required extent, not whether the head must be wiped.