469. hadíth
وَ سَأَلَ أَبُو اَلصَّبَّاحِ اَلْكِنَانِيُّ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ: عَنِ اَلَّتِي تَحِيضُ فِي كُلِّ ثَلاَثِ سِنِينَ مَرَّةً كَيْفَ تَعْتَدُّ قَالَ "تَنْظُرُ مِثْلَ قُرُوئِهَا اَلَّتِي كَانَتْ تَحِيضُ فِيهِ فِي اَلاِسْتِقَامَةِ فَلْتَعْتَدَّ ثَلاَثَةَ قُرُوءٍ ثُمَّ لْتَتَزَوَّجْ إِنْ شَاءَتْ".
Abu al-Sabbah al-Kinani asked Abu Abdullah (a.s) about a woman who menstruates once every three years-how should she observe her waiting period? Imam (a.s) said: "She should consider the usual menstruation cycles she used to have when her menstruation was regular and observe a waiting period of three menstrual cycles. Then, if she wishes, she may marry."