What is the evidence for the obligation of purifying the body and clothing from ritual impurity during tawaf?

The Shaykh : What is the evidence for the condition of purifying the body and clothing from ritual impurity for the one performing tawaf around the Sacred House, and may Allah reward you with good?
As for the one who adopts the hadith: , the evidence is clear, because purity in the body and clothing is obligatory in prayer. As for the one who does not consider this, he says: If Allah commanded that His House be purified for those who perform tawaf, then the purity of the tawaf performer's body and his clothing, which is in direct contact with him, is all the more so. Because the ground is separate from the person, so if purification of the ground is commanded, then what is in direct contact with the person is all the more so. In any case, you know that there is scholarly disagreement on this issue, yes.

The questioner : ...

The Shaykh : Yes, what?