Alms Tax: Paying Fitrah for a Guest
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 2007
It is obligatory for one to give the fiṭrah of a guest who arrives at his house before sunset on the eve of Eid al-Fiṭr and spends the night at his place and is considered his dependant, albeit only temporarily.
-Ayatullah Sistani, Practical Laws of Islam, Alms Tax (Zakat)