The ruling on wiping over a cast on the foot and the lower leg

Question:
Honorable Shaykh, if a person has a cast on his leg from his foot up to near the knee, does he wipe over the entire cast, or only the part that is obligatory to wash? I mean, is this in the case of combat, or in the case of ablution?

Answer:
He wipes over the entire cast that is on the lower leg. As for ablution, the lower leg is not a place for wiping; the foot is washed. If there is a cast on the lower leg, there is no wiping on it. Yes, the foot is washed from the ankle and up. If the cast covers the ankle, he wipes over what is there, washes the foot, and wipes over...
...the rest of the foot that the cast covers. He combines wiping and washing: he washes the visible parts and wipes over the parts covered by the cast. Yes, meaning, if the cast covers part of the foot from the ankle and below, he wipes over the cast and completes the washing of the remaining visible parts of the foot. However, if the cast is entirely on the lower leg above the ankle, there is no wiping on it. Yes.