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Al-Qāsim ibn Muhammad ibn Abu Bakr as-Siddiq ( ) ( d. 106 AH or 108 AH ) was an important jurist in early Islam .
 ibn Muhammad ibn Abu Bakr
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
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Answer:
 ibn Muhammad ibn Abu Bakr