Hosea 9:9

They have deeply corrupted themselves,

‘As in the days of Gibeah,

He will remember their iniquity,

He will visit their sins.'

For YHWH's charge against Israel was that their sins were as deep as the sins of Gibeah, which had also had sexual motivation and had been of the most despicable kind (see Judges 19:22 ff). They had deeply corrupted themselves. And just as He had taken note of the sins of Gibeah, which had almost resulted in the extinction of one of the tribes of Israel, so He would remember theirs, and would visit them with judgment because of them.