The Meaning of "He Rode on a Donkey with an Ikaf on It..." in the Hadith

Question:
What is the relevance of the hadith ("He rode on a donkey with an ikaf on it, and on the ikaf was a Fadak woolen blanket...") to the Book of Clothing?

Answer:
Because—may Allah know best—sitting on something is a type of clothing, and because it is closer to him... it is a form of humility. Just as people are humble in their seating and their carpets, and what they lean on, so too are they humble in what they ride.
Q: It says in the hadith: He rode on a donkey with an ikaf on it, and on the ikaf was a Fadak woolen blanket...
The Shaykh: On top of the ikaf, meaning it was spread over the ikaf.
Q: What is an ikaf?
The Shaykh: It appears to be like a saddle blanket that is placed on the donkey, something that is padded and put on the back of the donkey. It has a filling of fiber or something similar, placed on the donkey, and the rider rides on it. We call it a saddle blanket, and it is called an "ikaf" in the language.