The Case of One Who Vows to Fast a Certain Day or for Thanksgiving

7. Ali ibn Ibrahim has narrated from Harun ibn Muslim from Mas’adah ibn Sadaqah who has said the following: “Abu ‘ Abd Allah عليه السلام, has narrated from his ancestors, ‘Alayhim al-Salam, who have stated this Hadith. ’If a man places upon himself fasting of certain known days of every month, then he goes on a journey and many months pass, such person is not required to fast on a journey as well as at home when he comes back.’”