أَخْبَرَنَا خَلِيفَةُ بْنُ خَيَّاطٍ، حَدَّثَنَا غُنْدَرٌ، حَدَّثَنَا شُعْبَةُ، عَنْ قَتَادَةَ، عَنْ عِكْرِمَةَ، قَالَ: "الْمُسْتَحَاضَةُ وَالَّتِي لَا يَسْتَقِيمُ لَهَا حَيْضٌ فَتَحِيضُ فِي شَهْرٍ مَرَّةً وَفِي الشَّهْرِ مَرَّتَيْنِ، عِدَّتُهَا ثَلَاثَةُ أَشْهُرٍ".
It is narrated from Qatadah: Ikrimah (the freed slave of Sayyiduna Ibn Abbas, may Allah be pleased with them both) said: The woman experiencing istihada (irregular bleeding) and the woman whose menstruation is not regular—sometimes she menstruates once a month, sometimes twice—their waiting period (‘iddah) will be three months (i.e., the waiting period after divorce).