Muwatta MalikChapter 2Hadith 38
Full Sharh — Muwatta Malik 38
Mauquf Daif
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَالَ إِذَا نَامَ أَحَدُكُمْ مُضْطَجِعًا فَلْيَتَوَضَّأْ .
English Translation
Yahya related to me from Malik from Zayd ibn Aslam that Umar ibn al-Khattab said, "If you fall asleep Iying down you must do wudu ( before you pray)
Source
Muwatta Malik(موطأ مالك)
Purity
Hadith Number
38
Grade
Mauquf Daif