The ruling on taking money in exchange for building a mosque

Question:
The questioner says: Honorable Shaykh, may Allah have mercy on you. A man works with one of the benefactors, and he and the people of his town asked the benefactor to build them a mosque. So this benefactor built it for them. After seeing the mosque, he gave him fifty thousand riyals and said, “This is for you.” Is it permissible for him to take it? Yes. A man works with one of the benefactors, and he asked. With one of the benefactors. He asked the benefactor, he and the people of his town, to build them a mosque. So he built it for them. After this benefactor saw the mosque, he gave him fifty thousand riyals and said, “This is for you.” Is it permissible for you?

Answer:
Yes, if he took it, or if he left it seeking the reward from Allah the Exalted. If he left it seeking the reward, that is better. And if he took it, there is no harm.

The presenter:
Okay. Meaning, in exchange for my work. Yes.