Is a conditional intention sufficient for the obligatory fast of Ramadan?
General Chapter
Al-Mughni
Book of Fasting
Primary text
The conditional intention ('If tomorrow is Ramadan, I am fasting') is not sufficient for the obligatory fast based on the primary ruling because a definite affirmation concerning the obligatory nature of the fast from Ramadan was not made.
Supporting text
The conditional intention suffices for a voluntary fast (nafl) according to the same ruling structure.