Many people, especially merchants, swear oaths a lot in selling or buying. One hears merchants, drivers, workers swearing oaths that something is good quality, or that a statement is true, etc. What is the ruling concerning this swearing?
Dear scholars, As-Salamu `alaykum. Does swearing by something other than Allah nullify one’s Islam? And what if one says something but he was not really paying attention to what he was saying (e.g. if you were really sleepy and you didn’t really mean it and then when you realize what you are doing and that it is not good, you stop.) In that case is one excused from what he has said? And what if one just thinks it but does not mean to, and then do not say it? May Allah reward you for your help. Jazakum Allah khayran.