Is the lam that enters the indefinite in (in) a lam of beginning or a new distinguishing lam?
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The Shaykh : And what is in it?
The student: ...
The Shaykh : Yes, this is the disagreement among the scholars regarding the lam: is it the lam of beginning or the new distinguishing lam? Because if you say, "We have known that you are a believer," and we say it is the lam of beginning, then the kasrah of in is necessitated, because the verb becomes suspended, and it has been established for us that this is one of the causes of the kasrah. And if we make it a new lam, then its presence is like its absence, and in this case, it is permissible to say, "We have known that you are a believer." Yes, this is the difference. But as I told you, the difference does not require us to pay much attention to it. Yes, yes.
The student: ...
The Shaykh : Yes, this is the disagreement among the scholars regarding the lam: is it the lam of beginning or the new distinguishing lam? Because if you say, "We have known that you are a believer," and we say it is the lam of beginning, then the kasrah of in is necessitated, because the verb becomes suspended, and it has been established for us that this is one of the causes of the kasrah. And if we make it a new lam, then its presence is like its absence, and in this case, it is permissible to say, "We have known that you are a believer." Yes, this is the difference. But as I told you, the difference does not require us to pay much attention to it. Yes, yes.