1. Too much joking is a sign of ignorance.
1ـ كَثْرَةُ الهَزْلِ آيَةُ الجَهْلِ.
2. Whoever jokes too much is considered ignorant.
2ـ مَنْ كَثُرَ هَزْلُهُ اُسْتُجْهِلَ.
3. Whoever jokes a lot, his seriousness becomes ineffective [and is considered just another of his jokes].
3ـ مَنْ كَثُرَ هَزْلُهُ بَطَلَ جِدُّهُ.
4. Whoever is overcome by jest, his intellect becomes corrupt.
4ـ مَنْ غَلَبَ عَلَيْهِ الهَزْلُ فَسَدَ عَقْلُهُ.