Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said: After being wounded, Sayyiduna Umar (may Allah be pleased with him) lived for 3 (three) days and then passed away. He was given the ritual bath (ghusl) and was also shrouded.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 16016