On the fact that making "ma" a relative pronoun in our saying "every maker and what he made" is not good, due to the possibility that the maker may come and the thing made for him may not come, causing them to be separated.

The Shaykh : Every maker and his making, every man and his height, every man and his shortness, every man and his blackness, every man and his whiteness. These are two things that are inseparable. So when the conjunction "wa" (and) comes, and what precedes it is inseparable from what follows it, it becomes a clear text regarding accompaniment. Is that clear, everyone?
The student: Clear.

The Shaykh : So, regarding "and what he made," we say that "ma" here must be understood as a source particle (masdariyyah), meaning: every man and his making. Why? Because if you said "and what he made" with "ma" as a relative pronoun, this would not be a clear text regarding accompaniment, because it is possible for the man the maker and the thing made to be in the garage, right? So, then.