וטעם אשר לו ארבע רגלים. וכבר נכתב ההולך על ארבע. שיתכן שיש שרץ יש לו ד׳ רגלים ולא ילך בהן רק יעוף לבדו: [BUT ALL WINGED SWARMING THINGS.] Scripture had previously stated, that go upon all fours (v. 20).59Scripture had previously stated that go on all four are…detestable (v. 21). Why then state here, But all winged swarming things which have four feet are…detestable? The Torah now states, But all winged swarming things, which have four feet, because it is possible that there is a swarming creature that has four legs but that does not walk upon them but only flies.60Verse 20 teaches that a swarming creature that walks on four legs is detestable. Our verse teaches that a swarming creature that has four legs is detestable even if it does not walk upon them. Our verse thus not repeat verse 20.