Is it true that the earnings of a cup-taker are impure if he asks for them, and not impure if he does not ask?

The questioner : The Prophet (peace and blessings be upon him) said that the earnings of a cup-taker are impure. They say here that if he does not ask, it is permissible, but if he asks, it becomes impure. What is your opinion? May Allah reward you with good? Even though I know that our knowledge of your opinion is...

The Shaykh : It is a combination of the fact that the Messenger (peace and blessings be upon him) gave to the cup-taker and the fact that the earnings of a cup-taker are impure. We say this with this distinction, and it is necessary.