Hanafi
The sources give no view for it here.
اشتراط عدد الأحجار في الاستجمار
هل يجب اعتبار عدد الأحجار في الاستجمار؟
Each school’s answer
Hanafi
Not stated in the sources
Maliki
Not stated in the sources
Shafi'i
Not stated in the sources
Hanbali
Not stated in the sources
The texts
واختلفوا في وجوب اعتبار عدد الأحجار من الاستجمار واختلفوا في وجوب اعتبار عدد الأحجار من الاستجمار
«الإفصاح», Ibn Hubayra p. 32
From the schools’ own books
Maliki
The sources give no view for it here.
Shafi'i
The sources give no view for it here.
Hanbali
The sources give no view for it here.
What bears this mark is in our words, our standard wording; the books’ texts stay as they are.