Examples given in Quran

 وَتِلْكَ الْأَمْثَالُ نَضْرِبُهَا لِلنَّاسِ وَمَا يَعْقِلُهَا إِلَّا الْعَالِمُونَ 29:43

(Fathe Muhammad Jalandari)
اور يہ مثاليں ہم لوگوں کے (سمجھانے کے) لئے بيان کرتے ہيں اور اُسے تو اہلِ دانش ہي سمجھتے ہيں 29:43

(Muhammad Assad)
 29:43 And so We propound these parables unto man: but none can grasp their innermost meaning save those who [of Us] are aware 29:43

(Yousaf Ali)
 29:43 And such are the Parables We set forth for mankind, but only those understand them who have knowledge.29:43