Talmud zu Tehillim 58:12

He would also say: Anyone who commits himself to studying words of Torah becomes surrounded by a circle of committed colleagues. And anyone who neglects studying words of Torah becomes surrounded by a circle of neglectful companions. And then he is attacked by a lion, a wolf, a tiger, a hyena, or a snake. Or soldiers or thieves come and surround him and take his money, as it says (Psalms 58:12), “For there is a God who judges upon the earth.”