A vow to pray without specifying the number of rak'ahs
Machine translationRead the Arabic original
The questioner:
I say: Honorable Shaykh, may Allah grant you success, a man made a vow to pray a prayer but did not specify it. Does one rak'ah suffice for him?
The Shaykh:
Two rak'ahs are required when praying, if you lengthen it.
The questioner:
The method.
The Shaykh:
That is, the minimum is two rak'ahs, yes.
I say: Honorable Shaykh, may Allah grant you success, a man made a vow to pray a prayer but did not specify it. Does one rak'ah suffice for him?
The Shaykh:
Two rak'ahs are required when praying, if you lengthen it.
The questioner:
The method.
The Shaykh:
That is, the minimum is two rak'ahs, yes.
Source
قناة «العلامة الدكتور صالح الفوزان»، 141/140 شرح زاد المستقنع/ صالح الفوزان — youtube.com (52:02)
The Arabic text is a machine transcription of the audio recording.