Is it correct or is it wrong and forbidden for a son to abandon his mother due to her danger to him, at the father's request?

It is not permissible to abandon one's mother, for the rights of parents are great and are not forfeited by their injustice or mistreatment. It is obligatory to treat them kindly and maintain ties with them in a way that does not result in harm. Kindness and maintaining ties are achieved through all possible forms of benevolence, such as calling, corresponding, and gifting.