Chapter on the Basic Denominators
There are seven base numbers: 2, 3, 4, 6, 8, 12, and 24.
Only the six, its double, and the double of its double are liable to ʿawl (proportional reduction when the estate cannot cover the fixed shares).
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The denominator 6 can be successively increased until it reaches 10.
• It rises to 7 in the case of a husband, a consanguine sister, and a grandmother.
• It rises to 8 with a husband, a mother, and a consanguine sister; this combination is called “al-Mubāhala.”
• It rises to 9 with a husband, two uterine siblings, and two consanguine sisters; this is known as “al-Gharāʾ,” also “al-Marwāniyya.”
• It rises to 10 with a husband, a mother, two uterine sisters, and two consanguine sisters⦗1⦘, nicknamed “Umm al-Furūkh.” -
The denominator 12 may likewise⦗2⦘ be subjected to ʿawl on its own up to [seventeen]⦗3⦘.
• It becomes 13 with a husband, two daughters, and a mother.
• It becomes 15 with a husband, two daughters, and both parents.
• It becomes 17 with three wives, two grandmothers, and four uterine sisters.