2 Kings 17:9

And the sons of Israel will cover the words not thus concerning Jehovah their God, and they will build to them heights in all their cities from the tower of those watching even to the fortified city.

2 Kings 18:8

He struck the rovers even to Azzah, and her bounds from the tower of those watching to the fortified city.

Deuteronomy 13:6

When thy brother, the son of thy mother, shall entice thee, or thy son, or thy daughter, or the wife of thy bosom, or thy friend who is as thy soul, in secret, saying, We will go and serve other gods which thou knewest not, thou, and thy fathers;

Deuteronomy 27:15

Cursed the man, who shall make a graven and molten thing, an abomination of Jehovah, the work of the hand of the artificer, and put it in hiding: and all the people answered and said, Amen.

Job 31:27

And my heart will be seduced in secret, and my hand shall kiss to my mouth:

Ezekiel 8:12

And he said to me, Sawest, thou son of man, what the old men of the house of Israel are doing in darkness, a man in the chambers of his images? for they are saying, Jehovah sees us not; Jehovah forsook the earth.

Hosea 12:11

If Gilead nothing? Surely they were vanity: in Gilgal they sacrificed oxen; also their altars as heaps upon the furrows of the field.

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
When thy brother, the son of thy mother, shall entice thee, or thy son, or thy daughter, or the wife of thy bosom, or thy friend who is as thy soul, in secret, saying, We will go and serve other gods which thou knewest not, thou, and thy fathers;
Deuteronomy 27:15
Cursed the man, who shall make a graven and molten thing, an abomination of Jehovah, the work of the hand of the artificer, and put it in hiding: and all the people answered and said, Amen.
Job 31:27
And my heart will be seduced in secret, and my hand shall kiss to my mouth:
Ezekiel 8:12
And he said to me, Sawest, thou son of man, what the old men of the house of Israel are doing in darkness, a man in the chambers of his images? for they are saying, Jehovah sees us not; Jehovah forsook the earth.

From the tower

2 Kings 18:8
He struck the rovers even to Azzah, and her bounds from the tower of those watching to the fortified city.
Hosea 12:11
If Gilead nothing? Surely they were vanity: in Gilgal they sacrificed oxen; also their altars as heaps upon the furrows of the field.