أَمْثَالٌ 27:22

إِنْ دَقَقْتَ ٱلْأَحْمَقَ فِي هَاوُنٍ بَيْنَ ٱلسَّمِيذِ بِمِدَقٍّ، لَا تَبْرَحُ عَنْهُ حَمَاقَتُهُ.

Though thou shouldest bray a fool in a mortar among wheat with a pestle, yet will not his foolishness depart from him.