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I read the following
Svaal-Javaab (Question-Answer) in Atam Science Magazine, which I found applicable to me. If anyone has any more thoughts on it, please share.
Question : We sit and recite Sri Rehraas Sahib Paath as a family, and after that we recite Sri Sohila Sahib Paath. When it comes to sleeping, I don't recite Sri Sohila Sahib; is there anything wrong in this? Should I lay down and recite Paath?
Answer : (from Bhai Raghbir Singh Bir): Sri Sohila Sahib Paath should be recited at the time of going to bed. Even if you have recited it along with Sri Rehraas Sahib, you should recite it again before sleeping. Ideally, after reciting Sri Sohila Sahib, you should start simran, and then when sleep arises, then you should go to sleep.