The first part of that verse stated: “And behold a second beast, similar to a bear” (Daniel 7:5). Rav Yosef taught: These are Persians, who eat and drink copious amounts like a bear, and are corpulent like a bear, and grow hair like a bear, and have no rest like a bear, which is constantly on the move from one place to another. When Rabbi Ami saw a Persian riding, he would say: This is a bear on the move.