# He swallows down riches ... cast them out of his stomach

"The wicked person becomes very wealthy, but he loses his wealth like a person who vomits up his food. God causes him to lose it all"

# He swallows down riches

"The wicked man gains much wealth and keeps it all for himself" or "The wicked man steals many riches"

# God will cast them out of his stomach

This refers to causing the man to lose his riches.