الباطن
هو اسمٌ من أسماء الله الحسنى، يدل على صفة (الباطنيَّةِ)؛ أي إنه...
Abu Sa‘īd al-Khudri (may Allah be pleased with him) reported: I went to Qubā’ with the Messenger of Allah (may Allah's peace and blessings be upon him) on Monday. On reaching (the locale of) Banu Sālim, the Messenger of Allah (may Allah's peace and blessings be upon him) stood at ‘Itbān’s door and called out to him loudly. He came out dragging his lower garment. When he saw that, the Messenger of Allah (may Allah's peace and blessings be upon him) said: "We made the man hurry." ‘Itbān said: "O Messenger of Allah, if a man parts from his wife suddenly (during sexual intercourse) without discharging semen, what will he be required to do?" The Messenger of Allah (may Allah's peace and blessings be upon him) said: "It is water (seminal discharge) that makes water (ritual bath) obligatory."
This Hadīth that was reported by Abu Sa‘īd al-Khudri indicates that ritual bath becomes obligatory after ejaculation. The first 'water' mentioned in the Hadīth refers to seminal fluid, whereas the second "water" refers to water that is commonly known. The Hadīth indicates that the obligation of ritual bath is restricted to ejaculation and that no ritual bath is due when the two circumcised parts meet. However, this ruling was abrogated and ritual bath has become obligatory when sexual intercourse takes place, even if there is no ejaculation. This is proven by this Hadīth: "If the two circumcised parts meet, ritual bath becomes obligatory."