Reference: Fataawa al-Hajj wal-‘Umrah waz-Ziyaarah – Page 96
Question: What is the ruling regarding one who made the Hajj and then departed from ‘Arafah before sunset due to his work commitments?
Response: According to a majority of the People of Knowledge, the one who departed from ‘Arafah before sunset is required to make fidyah (ransom) except if he were able to return there during the night, then the fidyah (ransom) is not required. And the fidyah (ransom) is to perform a sacrifice and distribute it to the poor and needy in Makkah.