about repeating purchases from sellers such that the total amount purchased exceeds five wasqs: Is that permissible?

The Shaykh : I mean, if one person buys three wasqs from this man and buys three wasqs from another man, what is the total?
The student: Six.

The Shaykh : Six wasqs. Is this permissible or not permissible?
The student: It is permissible.

The Shaykh : That is the case. But if he buys the six from one person, is it permissible or not permissible? You, Ahmad—listen, may Allah bless you—is it permissible or not permissible from one person?
The student: From one person?

The Shaykh : Yes, exactly.
The student: It is not permissible.

The Shaykh : That is it, that is the issue.
The student: Shaykh!

The Shaykh : Yes? Mahbub! What is it?
The student: If he bought it from one merchant...

The Shaykh : It appears that it is not permissible, unless he sells off what he has, in which case it is permissible if he sells it off, there is no harm. Yes?
The student: If a condition is lacking, meaning one of the eight conditions, for example, that the currency is with him?

The Shaykh : It is not permissible to buy with currency, yes.