Verse
7:176 compares unbelievers to "panting dogs" with regard to their idiocy and worthlessness.
Verse
7:179 says they are like "cattle" only worse.
Verse
9:28 says the unbelievers are unclean.
Verse
6:111 says they are ignorant.
Verse
23:55 says they are helpers of the devil.
Verse
5:60 even says that Allah transformed Jews of the past into apes and pigs. This is echoed by verses
7:166 and
2:65.
A hadith (Bukhari
54:524) says that Muhammad believed rats to be "mutated Jews" (also confirmed by Sahih Muslim
7135 and
7136).