Answered by Mufti Mohammed Tosir Miah
It is known that covering head in umrah is unlawful , but if a person mistakenly covers his head , then what will he do what he have to pay expiation , please give me referenced with the saying of Salaf on this matter
The rule in terms of an expiation being necessary is the same whether one commited the transgression of Ihraam intentionally, unintentionally or accidently.
If someone covered his head for a complete day (12 hours) then a Damm would be obligatory, which consists of the sacrificing of 1/7 of a camel or cow or the complete sacrifcing of a goat or sheep. If one wore it for less than 12 hours then Sadqah Fitr amount would need to be given to the poor. (Hidayah p.267 v.1)
Only Allah Knows Best
Mufti Mohammed Tosir Miah
Darul Ifta Birmingham