2 Kings 17:9

And the sons of Israel had secretly done those things that were not right against the LORD their God, building themselves high places in all their cities, from the towers of the watchmen to the fenced cities.

2 Kings 18:8

He smote the Philistines, even unto Gaza and the borders thereof, from the towers of the watchmen to the fenced city.

Deuteronomy 13:6

If thy brother, the son of thy mother, or thy son or thy daughter or the wife of thy bosom or thy friend who is as thine own soul should entice thee secretly, saying, Let us go and serve other gods, which thou nor thy fathers have known,

Deuteronomy 27:15

Cursed is the man that makes any graven or molten image, an abomination unto the LORD, the work of the hands of the craftsman, and puts it in a secret place. And all the people shall answer and say, Amen.

Job 31:27

and my heart has been secretly enticed, and my mouth kissed my hand;

Ezekiel 8:12

Then said he unto me, Son of man, hast thou seen what the elders of the house of Israel do in the dark, each man in the chambers of his imagery? for they say, The LORD does not see us; the LORD has forsaken the earth.

Hosea 12:11

Is Gilead iniquity? surely they are vanity: they sacrifice bullocks in Gilgal; yea, their altars are as heaps in the furrows of the fields.

Treasury of Scripture Knowledge

Summary

And the children of Israel did secretly those things that were not right against the LORD their God, and they built them high places in all their cities, from the tower of the watchmen to the fenced city.

From the tower

Bible References

Secretly

Deuteronomy 13:6
If thy brother, the son of thy mother, or thy son or thy daughter or the wife of thy bosom or thy friend who is as thine own soul should entice thee secretly, saying, Let us go and serve other gods, which thou nor thy fathers have known,
Deuteronomy 27:15
Cursed is the man that makes any graven or molten image, an abomination unto the LORD, the work of the hands of the craftsman, and puts it in a secret place. And all the people shall answer and say, Amen.
Job 31:27
and my heart has been secretly enticed, and my mouth kissed my hand;
Ezekiel 8:12
Then said he unto me, Son of man, hast thou seen what the elders of the house of Israel do in the dark, each man in the chambers of his imagery? for they say, The LORD does not see us; the LORD has forsaken the earth.

From the tower

2 Kings 18:8
He smote the Philistines, even unto Gaza and the borders thereof, from the towers of the watchmen to the fenced city.
Hosea 12:11
Is Gilead iniquity? surely they are vanity: they sacrifice bullocks in Gilgal; yea, their altars are as heaps in the furrows of the fields.