Hadith 509971
Chapter 21: Jihad - كتاب الجهاد
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، غُسِّلَ وَكُفِّنَ وَصُلِّيَ عَلَيْهِ وَكَانَ شَهِيدًا يَرْحَمُهُ اللَّهُ .
Yahya related to me from Malik from Nafi from Abdullah ibn Umar that Umar ibn al-Khattab was washed and shrouded and prayed over, yet he was a martyr, may Allah have mercy on him .
Reference Muwatta Malik 509971
USC-MSA web (English) reference : Book 21, Hadith 36