The meaning here is that only one of these is explicitly stated as obligatory in the Quran, while it is possible for other ritual baths (ghusls) to be proven obligatory through the Sunnah. We have already explained the evidence from the Sunnah regarding the obligation of these ritual baths. He, (Shaykh (Al-Mufid)), then began to mention the recommended (sunnah) ghusls. He, (Shaykh (Al-Mufid)), said: "As for the recommended ghusls, the ghusl of Friday is a strongly emphasized sunnah for both men and women." This is supported by the narration of Uthman ibn Isa from Sama’ah, from Imam Abu Abdullah عليه السلام, mentioned earlier.