רש''י: כ
1.who rode the donkey in the past? Avraham rode on the donkey.
2.how is the donkey so special? the donkey is special because Avraham rode on it in the past for עקדת יצחק and the משיח would ride on it in the future.
3.who would ride on the donkey in the future?משיח
4.on who is it said ''poor and riding on the donkey"

המיוחד-that was special
שחבש אברהם-that Avraham saddled
להתגלות עליו-to revile himself on