Translation of the verse 5 from Surah Al-Jinn : Number of verses 28 - - page 572 - Part 29.
'And verily, we thought that men and jinns would not utter a lie against Allah.
And we had thought that mankind and the jinn would never speak about Allah a lie.
(72:5) and that 'we had thought that men and jinn would never speak a lie about Allah', *6
*6) That is, "We were misled by those falsehoods because we could never think that the men or the jinn could ever dare forge a lie about Allah, but having heard this Qur'an we now know that they were, in fact, liars."
Source : Al-Jinn Verse 5: And we had thought that mankind and the jinn would never speak about Allah a lie.