Sayyiduna Khabbab (may Allah be pleased with him) said: "I saw Sayyiduna Hamzah (may Allah be pleased with him), and we found no cloth in which to shroud him except a single cloak. When we covered his feet with it, his head was exposed, and when we covered his head, both his feet were exposed. So we covered his head and placed idhkhir grass over his feet."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 3666