It is narrated from Ali ibn Asbat, from his uncle Yaqub Al-Ahmar, from Abu Basir, from Abu Abdullah عليه السلام, said: I asked Imam عليه السلام about a woman who was menstruating and then saw the sign of purity. Can her husband approach her before she performs the ritual purification (ghusl)? Imam عليه السلام said: "No, not until she performs ghusl." He (Narrator) continued: "I asked Imam عليه السلام about a woman who menstruated while traveling, then became pure but could not find water for one or two days. Is it permissible for her husband to approach her before she performs ghusl?" Imam عليه السلام said, "No, it is not proper until she performs ghusl."