What is the ruling if they go out to the camps for a specific period and pray in congregation at the end of the night?
Machine translationRead the Arabic original
The questioner : In the camps, if they go out for a week, ten days, or less.
The Shaykh : Yes.
The questioner : Do they pray in congregation at the end of the night? Sometimes it is for most of this period, not every night?
The Shaykh : No, it is better that they do not pray it every night; they should not pray it every night.
The questioner : It is more invigorating for the individuals, because some of them sleep, or some of them... if they pray in congregation, it is more invigorating for them.
The Shaykh : Not all... what? Build yourself up.
The Shaykh : Yes.
The questioner : Do they pray in congregation at the end of the night? Sometimes it is for most of this period, not every night?
The Shaykh : No, it is better that they do not pray it every night; they should not pray it every night.
The questioner : It is more invigorating for the individuals, because some of them sleep, or some of them... if they pray in congregation, it is more invigorating for them.
The Shaykh : Not all... what? Build yourself up.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 1036 - ما الحكم إذا خرجوا في المعسكرات لمدة معينة يصلون في آخر الليل جماعة؟ ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.