Translation of the verse 59 from Surah Ar-Rum : Number of verses 60 - - page 410 - Part 21.
Thus does Allah seal up the hearts of those who know not [the proofs and evidence of the Oneness of Allah i.e. those who try not to understand true facts that which you (Muhammad SAW) have brought to them].
Thus does Allah seal the hearts of those who do not know.
(30:59) Thus does Allah seal the hearts of those who have no knowledge.
Source : Ar-Rum Verse 59: Thus does Allah seal the hearts of those who do not know.