QURAN
Surah 2. The Cow
6. As to those who reject Faith, it is the same to them whether thou warn them or do not warn them; they will not believe.
7. Allah hath set a seal on their hearts and on their hearing, and on their eyes is a veil; great is the penalty they (incur).
8. Of the people there are some who say: "We believe in Allah and the Last Day;" but they do not (really) believe.
9. Fain would they deceive Allah and those who believe, but they only deceive themselves, and realise (it) not!
10. In their hearts is a disease; and Allah has increased their disease: And grievous is the penalty they (incur), because they are false (to themselves).