Continuing the explanation of the previous verse: . . . . . . . . . . . . and the preposition of place is made clear by the letter ba *** and in and qad make the cause clear.

The Shaykh : And it was added, "and the preposition of place is made clear by ba"
The preposition of place: it is the fronted object of his saying: "and is made clear" meaning: it is made apparent, meaning: that the letter ba comes for the preposition of place, the letter ba, the letter ba
"and the preposition of place is made clear by ba *** and in and qad make the cause clear"
Meaning: the preposition of place is made clear, it is made apparent, meaning: that the letter ba comes as a preposition of place, it comes for the preposition of place, as for the letter ba, an example of it is the saying of Allah the Exalted: meaning: and in the night, and it is very common in Arabic and customary speech, you say for example: I resided in Unaizah, I resided in Buraydah, I resided in al-Bada'i, I resided in Makkah, I resided in Riyadh, and so on, the letter ba here in this context, all these examples are for the preposition of place, so the letter ba comes for the preposition of place often, and from that: I resided in Sulaymanah, or not?
The student: Yes.

The Shaykh : Yes, meaning: in Sulaymanah, good
"is made clear by ba and in" in for the preposition of place is very common, what is an example?
The student: I entered the mosque.

The Shaykh : I entered the mosque, I resided in such-and-such a town, it is also very common in the Qur'an: Yes and so on, so in for the preposition of place is very common, and qad, yes?