Wiping over a cast or performing tayammum (dry ablution with clean earth) instead of wudu' (the ablution for prayer)

Question:
Honorable Shaykh, may Allah grant you success. He says: If there is a cast on the hand and one wants to perform wudu' (the ablution for prayer), should he wipe over the cast, or perform tayammum (dry ablution with clean earth) for it?

Answer:
No one has said this, my brother. It is obligatory to remove the cast or anything else so that the water reaches the skin. One must not leave the cast on the limb; it must be removed before wudu' (the ablution for prayer). It is not something over which one wipes. For this reason, one of the conditions of wudu' (the ablution for prayer) is removing anything that prevents water from reaching the skin. This is necessary. Yes.