Al-Kāfi - Volume 6 > Divorce of a Pregnant Woman
Hadith #3

حُمَيْدُ بْنُ زِيَادٍ عَنِ الْحَسَنِ بْنِ مُحَمَّدِ بْنِ سَمَاعَةَ عَنْ عَبْدِ اللَّهِ بْنِ جَبَلَةَ وَ جَعْفَرِ بْنِ سَمَاعَةَ عَنْ جَمِيلٍ عَنْ إِسْمَاعِيلَ الْجُعْفِيِّ عَنْ أَبِي جَعْفَرٍ ( عليه السلام ) قَالَ طَلَاقُ الْحُبْلَى وَاحِدَةٌ فَإِذَا وَضَعَتْ مَا فِي بَطْنِهَا فَقَدْ بَانَتْ .

3. Flumayd ibn Ziyad has narrated from al-Hassan ibn Muhammad ibn Sama‘ah from ‘Abd Allah ibn Jabalah and Ja‘far ibn Sama‘ah from Jamil from ’Isma‘il al-Ju‘fiy ’Isma‘il who has said the following: “Abu Ja‘far, ‘Alayhi al-Salam, has said, ‘Divorce of a pregnant woman is one and when she gives birth to what is inside her, she becomes stranger to him.’”