It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Do not ever sleep in a state of major ritual impurity (janabah) without performing ablution (wudu).
Hadith Takhrij«قال الھيثمي: فيه رجل لم يسمّ ، (انظر مسند أحمد ترقيم الرسالة: 9093 ترقیم بيت الأفكار الدولية: 9082»
Brief Explanation
Benefits: … It is narrated from Sayyiduna Abu Hurairah radi Allahu anhu, he says: "Whenever the Messenger of Allah sallallahu alayhi wa sallam was in a state of major ritual impurity (junub) and intended to eat or sleep, he would perform ablution (wudu)." … When the Messenger of Allah sallallahu alayhi wa sallam was in a state of major ritual impurity and intended to eat food or sleep, he would perform ablution. (Al-Mu'jam al-Awsat, Tabarani)