Chapter: Expiation must be offered by one who declares his wife to be unlawful for him but does not intend divorce thereby
Ibn Abbas (Allah be pleased with them) reported about (declaring of one's woman) unlawful as an oath which must be atoned, and Ibn 'Abbas said: Verily, there is in the Messenger of Allah ( صلی اللہ علیہ وسلم ) a model pattern for you.
Authentic