What is the ruling on work that contradicts the Shari'ah? And what is the ruling on the wealth earned from it?

The questioner : I asked you regarding the ruling on work that contradicts the Shari'ah—specifically interior decoration for a shop. So what is the ruling on work that contradicts the Shari'ah? You told me that it is not permissible to work in any place that contradicts the Shari'ah. So, what is the ruling on the wealth, O Shaykh?

The Shaykh : ... .

The questioner : The ruling is that it is not permissible.

The questioner : So, what is the ruling on the wealth I have taken from this shop, while I am still working there?

The Shaykh : The wealth you took—did you know that your work was forbidden?

The questioner : No, of course not, O Shaykh.

The Shaykh : So, repent to Allah (Mighty and Majestic) and do not return to what you did.

The questioner : So, should I finish the work now, or should I stop?

The Shaykh : No, do not finish it.

The questioner : So, does that mean, O our Shaykh, that I will be fined for such work? What should I do?

The Shaykh : You will be fined; you must pay the fine from the wealth you earned by violating the Shari'ah.

The questioner : May Allah reward you with good.

The Shaykh : And beware of that.