Tafsir of Al-Mutaffifeen 83:30

Verily, those who committed crimes used to laugh at those who believed. And, whenever they passed by them, used to wink one to another. Allah informs that the criminals used to laugh at the believers in the worldly life. In other words, they would mock them and despise them. Whenever they would pass by the believers, they would wink at each other about them, meaning in contempt of them

وإذا انقلبوا إلى أهلهم انقلبوا فكهين