اَلْإِنْسَانُ ٱلنَّاقِصُ ٱلْفَهْمِ يَصْفِقُ كَفًّا وَيَضْمَنُ صَاحِبَهُ ضَمَانًا.
A man void of understanding striketh hands, and becometh surety in the presence of his friend.