Musar do Kapłańska 11:42

The second group consists of those who are begrudging to- wards others and lack the heart to give charity beyond a pittance to satisfy their pride. Yet when it comes to their own enjoyment they eat and drink freely and indulge themselves lightheartedly, making themselves as plump and robust as fatted calves. Concerning this group the Zohar comments (2:245a): These are the people who derive from the side of the snake. The mnemonic for them is the verse, “Whatever moves on its belly” (alluding to the snake; Vayikra 11:42). In other words, whoever has a large, fat belly emanates from the side of the one who was cursed with the words, “You shall move around on your belly” (Bereishis 3:14). Nevertheless, the members of this group have a little merit, even if they only give to satisfy their pride.