Hadith 340
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Hadith.3554 - In a narration reported by Fadalah from Aban, Abu Abdullah (as) said
"Regarding a child who grows up and chooses Christianity while one of his parents is a Christian or both of them are Muslims, he is not to be left (in that state), but rather he is compelled to follow Islam."
3554 - وَ رَوَى فَضَالَةُ عَنْ أَبَانٍ أَنَّ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ
فِي اَلصَّبِيِّ إِذَا شَبَّ فَاخْتَارَ اَلنَّصْرَانِيَّةَ وَ أَحَدُ أَبَوَيْهِ نَصْرَانِيٌّ أَوْ جَمِيعاً مُسْلِمَيْنِ قَالَ "لاَ يُتْرَكُ وَ لَكِنْ يُضْرَبُ عَلَى اَلْإِسْلاَمِ ".