Surah 71. Nuh, Ayah 27

Lit., "to such as are wicked (fajir), stubbornly ingrate (kaffar)": but since no one - and particularly not a prophet - is ever justified in assuming that the progeny of evildoers must of necessity be evil, it is obvious that the terms fajir and kaffar are used here metonymically, denoting qualities or attitudes, and not persons.