The ruling on fasting a vowed month consecutively or separately
Machine translationRead the Arabic original
Question:
Also, his other question says: I vowed to Allah that I would fast for a month, but I have not fasted yet. Is it permissible for me to fast five days and break the fast for five days, then fast five days and so on, or should I give charity on behalf of this month?
Answer:
If you intended a specific month, it is obligatory for you to fast that specific month, such as Rabi' al-Awwal, Rabi' al-Thani, or any other month. However, if you said "a month" without specifying which one, it is obligatory for you to fast thirty consecutive days, because this is what the term "month" implies. The term "month" implies that the fast must be consecutive, unless you intended to fast the number of days in a month even if they are not consecutive; in that case, you are bound by your intention. Yes.
Also, his other question says: I vowed to Allah that I would fast for a month, but I have not fasted yet. Is it permissible for me to fast five days and break the fast for five days, then fast five days and so on, or should I give charity on behalf of this month?
Answer:
If you intended a specific month, it is obligatory for you to fast that specific month, such as Rabi' al-Awwal, Rabi' al-Thani, or any other month. However, if you said "a month" without specifying which one, it is obligatory for you to fast thirty consecutive days, because this is what the term "month" implies. The term "month" implies that the fast must be consecutive, unless you intended to fast the number of days in a month even if they are not consecutive; in that case, you are bound by your intention. Yes.
Source
نور على الدرب - الفوزان - 03/268 — archive.org (9:08)
The Arabic text is a machine transcription of the audio recording.