After my father became old and unable to take care of his personal cleanliness, I helped him by cutting his moustache and shaving his pubic hair.
To do this I have to look at his `Awrah (parts of the body that must be covered in public), as this is essential. Am I sinful for this, because I heard that if anyone sees their parent's `Awrah, they should fast for two months, is this true?
All praise be to Allah Alone, and peace and blessings be upon the Messenger of Allah, his family and Companions.
There is nothing wrong with shaving your father's pubic hair if he is unable to do this for himself. With regard to what you heard about fasting for two months, this is untrue.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.