Waiting Period of a Woman whose Hayd (menses) is Confused

3. Sahl ibn Ziyad has narrated from Ahmad from ‘Abd al-Karim from abu Basir who has said the following: “Abu ‘Abd Allah عليه السلام, has said, ‘Waiting period of a woman who does not experience Hayd (menses) and the one who experiences Istihadah who does not be become clean is three months. Waiting period of one whose Hayd (menses) is straight is three Quru’ (Hayd free periods). Al-Quru’ (Hayd free period) is the time of accumulation of blood between two Hayd (menses).”’