Blood Relations
Question
What is called a blood relationship, and what is its significance?
Answer
A relationship by lineage (nasab) — such as brother, sister, paternal aunt, paternal uncle, maternal aunt, maternal uncle and so on — all these are relationships; nikah with them is haram. This prohibition is also mentioned in the Noble Qur’an — see the end of the fourth juz’: [ar]حُرِّمَتْ عَلَيْكُمْ أُمَّهَـٰتُكُمْ[/ar] “Forbidden to you are your mothers…
Source: Fatawa Mahmudiyya
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