It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings be upon him) was in a state of major ritual impurity (janabah) and wanted to eat or sleep, he would perform ablution (wudu).
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Qatadah (may Allah have mercy on him) except Shu'bah (may Allah have mercy on him), and no one narrated it from Shu'bah (may Allah have mercy on him) except Hajjaj (may Allah have mercy on him); Ishaq bin Ibrahim al-Qarqasani (may Allah have mercy on him) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 8403
Hadith Gradingمحدثین:إسناده حسن
Hadith Takhrij«قال الهيثمي: فيه إسحاق بن إبراهيم القرقساني وإسناده حسن «مجمع الزوائد ومنبع الفوائد، ج 1، ص 274»» «أخرجه أحمد فى «مسنده» برقم: 9216، والحميدي فى «مسنده» برقم: 1026، والطحاوي فى «شرح معاني الآثار» برقم: 770»