مشكوة المصابيح
Mishkat al-Masabih
كتاب النكاح
The Book of Marriage
(نِسْبَةُ الْوَلَدِ إِلَى غَيْرِ أَبِيهِ كَبِيرَةٌ)
(Attributing a child to someone other than their father is a major sin)
Hadith 3314
وَعَنْ سَعْدِ بْنِ أَبِي وَقَّاصٍ وَأَبِي بَكْرَةَ قَالَا: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنِ ادَّعَى إِلَى غَيْرِ أَبِيهِ وَهُوَ يَعْلَمُ أَنَّهُ غَيْرُ أَبِيهِ فَالْجَنَّةُ عَلَيْهِ حرَام»
Sa‘d b. Abu Waqqas and Abu Bakra reported God’s Messenger as saying, "If anyone knowingly claims as father one who is not his father, paradise is forbidden to him.” (Bukhari and Muslim.)
