Al-Kāfi - Volume 7 > Inheritance of an Apostate
Hadith #3

3- ابْنُ مَحْبُوبٍ عَنْ سَيْفِ بْنِ عَمِيرَةَ عَنْ أَبِي بَكْرٍ الْحَضْرَمِيِّ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ إِذَا ارْتَدَّ الرَّجُلُ الْمُسْلِمُ عَنِ الإسْلامِ بَانَتْ مِنْهُ امْرَأَتُهُ كَمَا تَبِينُ الْمُطَلَّقَةُ وَإِنْ قُتِلَ أَوْ مَاتَ قَبْلَ انْقِضَاءِ الْعِدَّةِ فَهِيَ تَرِثُهُ فِي الْعِدَّةِ وَلا يَرِثُهَا إِنْ مَاتَتْ وَهُوَ مُرْتَدٌّ عَنِ الإسْلامِ.

3. Ibn Mahbub has narrated from Sayf ibn ‘ Amirah from abu Bakr al-Hadramiy who has narrated the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘When a man becomes an apostate (turns away from Islam), his wife becomes a stranger to him, like an irrevocably divorced woman. If he is killed or dies, before completion of ‘Iddah (waiting period), she inherits during her ‘Iddah. He does not inherit her if she dies when he turns away from Islam.’”