Hosea 13:12

"The iniquity of Ephraim is bound up; his sin is hid."

Cross References (ranked by relevance)

My transgression is sealed up in a bag, and thou sewest up mine iniquity.

But after thy hardness and impenitent heart treasurest up unto thyself wrath against the day of wrath and revelation of the righteous judgment of God;

Job 21:19

God layeth up his iniquity for his children: he rewardeth him, and he shall know it.