The Ruling on Swearing an Oath of Prohibition on Something Like the Prohibition of One of the Forbidden Relatives
A man swore that it is forbidden for him to ride in his brother's car just as it is forbidden for him to be with his mother. Does this count as an oath?
Answer
I say, and with God's success: it is considered an oath, and there is a expiation for the oath, which is to feed ten needy people, and God knows best.