Surah 74: Absurdity

1. Allah to Muhammad: Hey you in the cloak. Get up and warn people. Wash your clothes. Avoid pollution. 74:1-5
2. Above it are nineteen. We've made their number a stumbling block to disbelievers. 74:30-31

(Allah apoointed 19 angels to oversee hell. This number somehow bothers nonbelievers.)