Umm Atiyyah (may Allah be pleased with her) narrates from the Prophet (peace and blessings be upon him) that he said: Apply camphor at the end, or something like camphor. Abdullah bin Mas'ud (may Allah be pleased with him) said that camphor is to be placed on the place of prostration.
Hammam bin Yahya said: Za'idah informed me that Alqamah narrates from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that he said: Camphor is to be placed on the place of prostration.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6705