Hosea 13:12

‘The iniquity of Ephraim is bound up,

His sin is laid up in store.

And this was all because of the way in which Ephraim treasured their sins. They had packaged them up, they had laid them up in store. They wanted to cling on to them and possess them continually. They did not want to do away with sin. And thus they clung on to their sin and made it their own.