Explanation of the words of Ibn Malik (may Allah have mercy on him): "And add an alif before it, confirming *** a verb attached to the nun of the women."

The Shaykh :"And add an alif before it, confirming *** a verb attached to the nun of the women"
"Add an alif before it"—before which of the two nuns? The heavy nun of emphasis, the heavy nun of emphasis.
"Add an alif before it, confirming *** a verb attached to the nun of the women"
It means: if you emphasize the verb attached to the nun of the women, here, then add an alif and then bring the nun of emphasis. Add an alif and then bring the nun of emphasis. Now, let us look at an example to clarify for you. You say: "O women, do not strike." You address women and say: "Do not strike." What is this nun?
The student: The nun of the women.

The Shaykh : The nun of the women. "La" is the negative particle, and "tadrib" is a present tense verb built on sukun in the position of jussive because it is attached to the nun of the women. Now, if I want to emphasize this verb, what do I do? I bring an alif after the nun. I bring an alif after the nun and say "la tadribnana." We bring an alif and then the nun of emphasis: "la tadribnana." Is that clear?
The student: Yes.

The Shaykh : Now, the author's words:
"And add an alif before it"
Meaning: the heavy nun of emphasis.
"Confirming *** a verb attached to the nun of the women"
Attached to the nun of the women. So, based on this, we bring the verb attached to the nun, and then after that an alif, and then the nun of emphasis. What did the alif bring? They said: we bring the alif to separate the nun of the women from the heavy nun of emphasis, so that three nuns do not gather in one place. So that three nuns do not gather in one place. Is that correct or not?
The student: Yes.

The Shaykh : Yes, that is how the Arabs pronounced it, but this is the grammarians' reasoning: so that three nuns do not gather in one place.