sinful person

Q:

1- In some Kitaabs stories are mentioned of pious people getting buried next to sinful people due to the punishment on the sinful it has effected the pious in the grave and caused the pious to get old and have white hair etc, is it proven from Quran and ahadith that burying a pious person next to a sinful person will harm the pious person in any way?

2- Is it proven from Quran and ahadith that a person who has passed away feels and knows when he is bathed, shrouded etc and who is doing it?