Treating doubt and obsessive compulsion in matters of Islamic law and ablution

The questioner:
The questioner Muhammad from Riyadh says: Sometimes doubt arises in me regarding some matters of the Shari'ah. Is there a cure for it in the Book and the Sunnah?

The Shaykh:
Do not pay attention to doubt, and do not pay attention to obsessive compulsion. If you are in a state of wudu' and you doubt whether you have broken it, you remain in your wudu', because certainty is not removed by doubt. And if you are not in a state of purity and you doubt whether you performed wudu', the default is that the state of impurity remains, so you perform wudu', and so on. Yes.

The questioner:
But he says: If one starts wudu' and then doubts whether he intended it or not, does he continue with the wudu' or repeat it?

The Shaykh:
If this is a matter of obsessive compulsion, he leaves it and rejects it; because he did not come and sit by the water and scoop it up except while intending wudu'. His action indicates the intention. Yes.

The presenter:
May Allah reward you,