The apothecary gives Romeo a poison that he requested, because he thought Juliet was dead.
What it is saying is it is like having a peanut butter jelly sandwich without the bread. It is ridiculous and something that is needed to make a whole of something. So like per say, you have a teddy bear but you buy that teddy bear but it has no filling in it. So it's like claiming to be a car salesman, without the cars. I hope this helps, sorry if it doesn't make sense.
Answer:
It means that “Allah” provides for his people so that when one falls into trouble, the solution is easy to find.
Explanation: