What is the reason for the foul odor emanating from the head of the deceased's father?

The bad odor emanating from a deceased body that has not been preserved in a refrigerator is a probable occurrence. Therefore, it has been legislated to perfume the deceased when preparing the body, to mask potential odors, as mentioned in the hadith in the Two Sahihs regarding camphor. It is also possible that the odor is from another deceased person or from another source. Jurists have stipulated the necessity of deepening the grave to conceal odors.