Hosea the prophet is speaking about Israel.

## false scales  ##

They used scales to measure the weight of the money or products they were selling/buying. These scales were not accurate.

## they love to defraud ##

These merchants are eager to cheat their customers by lying to them.

## I have certainly become very rich; I have found wealth for myself ##

These two phrases mean essentially the same thing (UDB). (See: [[rc://en/ta/man/translate/figs-doublet]])