1 Corinthians 10:19-20

What then do I say? that an idol sacrifice is any thing, or that an idol is any thing?

Revelation 2:14

But I have a few things against you; you have there those who hold the doctrine of Balaam, who taught Balak to put an occasion of sin before the children of Israel, both to eat things offered to idols and to commit fornication.

Treasury of Scripture Knowledge

Summary

They joined themselves also unto Baalpeor, and ate the sacrifices of the dead.

Of the dead

Bible References

Joined

Revelation 2:14
But I have a few things against you; you have there those who hold the doctrine of Balaam, who taught Balak to put an occasion of sin before the children of Israel, both to eat things offered to idols and to commit fornication.

Of the dead

1 Corinthians 10:19
What then do I say? that an idol sacrifice is any thing, or that an idol is any thing?