509. hadíth
وَ فِي رِوَايَةِ اِبْنِ فَضَّالٍ عَنْ غِيَاثٍ عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ عَنْ أَبِيهِ عَلَيْهِ اَلسَّلاَمُ قَالَ قَالَ عَلِيٌّ عَلَيْهِ اَلسَّلاَمُ: فِي رَجُلٍ ظَاهَرَ مِنْ أَرْبَعِ نِسْوَةٍ قَالَ "عَلَيْهِ كَفَّارَةٌ وَاحِدَةٌ".
In the narration of Ibn Faddal from Ghiyath, from Imam Jafar ibn Muhammad Al-Sadiq (a.s) from his father, Imam Muhammad ibn Ali Al-Baqir (a.s) (peace be upon them), it is reported that Imam Ali ibn Abi Talib (a.s) said regarding a man who performed ẓihar (a form of divorce by comparison) against four wives: "He is obligated to offer only one expiation."