Analysis of Concept siblings (Kalaleh) in verses and Islamic traditions

In the Quran, only two verses speak about inheritance of Kalaleh siblings (Kalaleh), verse 12 Surah Nisa and the other verse of 176 Surah Nisa. In this context, two issues discussed: First issue, between the first and second caliphs in the concept of siblings, the first caliph says: sibling (Kalaleh) is who has no father and no son, While the latter caliph says that: sibling (Kalaleh) is who has no father, and he has the other judicial decree) fatva (that he stop ) no spicial idea. ( But it is clear that the judicial decree of second caliph is not correct because when there are children, its the first level turn not the second level, which include brothers and sisters. And the second issue: in the two verses speaks about two different issues and this show is a kind of conflict, but according to narrations of the Ahlul Bayt (as) this conflict is resolved: This suggests that the verse 12 is about siblings of mother and verse 176 is about siblings of parents or siblings of father.