Hosea 8:11

Because Ephraim did multiply altars to sin, They have been to him altars to sin.

Hosea 12:11

Surely Gilead is iniquity, Only, vanity they have been, In Gilead bullocks they have sacrificed, Also their altars are as heaps, on the furrows of a field.

Deuteronomy 4:28

and ye have served there gods, work of man's hands, wood and stone, which see not, nor hear, nor eat, nor smell.

Isaiah 10:10-11

As my hand hath got to the kingdoms of a worthless thing, and their graven images, Greater than Jerusalem and than Samaria,

Jeremiah 16:13

And I have cast you from off this land, On to a land that ye have not known, Ye and your fathers, And ye have served there other gods by day and by night, Where I do not give to you grace.

Hosea 10:1-2

An empty vine is Israel, Fruit he maketh like to himself, According to the abundance of his fruit, He hath multiplied for the altars, According to the goodness of his land, They have made goodly standing-pillars.

Hosea 10:8

And destroyed have been high places of Aven, the sin of Israel. Thorn and bramble go up on their altars, And they have said to hills, Cover us, And to heights, Fall upon us.

Treasury of Scripture Knowledge

Summary

Because Ephraim hath made many altars to sin, altars shall be unto him to sin.

Bible References

Many

Hosea 10:1
An empty vine is Israel, Fruit he maketh like to himself, According to the abundance of his fruit, He hath multiplied for the altars, According to the goodness of his land, They have made goodly standing-pillars.
Hosea 12:11
Surely Gilead is iniquity, Only, vanity they have been, In Gilead bullocks they have sacrificed, Also their altars are as heaps, on the furrows of a field.
Isaiah 10:10
As my hand hath got to the kingdoms of a worthless thing, and their graven images, Greater than Jerusalem and than Samaria,

Altars

Deuteronomy 4:28
and ye have served there gods, work of man's hands, wood and stone, which see not, nor hear, nor eat, nor smell.
Jeremiah 16:13
And I have cast you from off this land, On to a land that ye have not known, Ye and your fathers, And ye have served there other gods by day and by night, Where I do not give to you grace.