The example Christ uses is the trickery of the Gentile prophet Balaam in weaponizing fornication and idolatry to corrupt the children of Israel in
Numbers. Balaam was the bad prophet employed by Balak a Midianite king to curse Israel. When Balaam failed to do so because God overrode his heart to bless Israel instead, Balaam hatched a scheme to get the Midianite women to lure the Israelite men into fornication with them and idolatry at idol worship feasts.
"While Israel dwelt in Shittim, the people began to commit fornication with the daughters of Moab. For they invited the people to the sacrifice of their gods, and the people ATE AND BOWED DOWN TO THEIR GODS."
This was done at the scheming advice of the evil and greedy prophet Balaam.
"It was these [women] who caused the children of Israel, through the counsel of Balaam, to act unfaithfully against Jehovah in the matter of Peor, so that the plague came upon the assembly of Jehovah." (Numb. 31:16)
The letters to the seven churches in Revelation 2 and 3 are highly symbolic actually applying to the whole church age. And in this symbolic warnings Christ condemns the eating of idol sacrifice food and fornication like failure of His saints. They have failed to see
"the deep things of Satan as they say" and been deceived.
To the church in Pergamos He speaks -
"But I have a few things against you, because you have some there who hold the teaching of Balaam, who taught Balak to put a stumbling block before the sons of Israel, to eat idol sacrifices and to commit fornication." (Rev. 2:14)
If you go back to
Numbers you can see that their eating was actually participating in the idolatrous feasts along with fornicating.
Again to Thyatira which represents the lowest point of the degradation of the Christian church being involved with the occult and
"the deep things of Satan as they say". It is not deep to Christ who has eyes of fire. But it is deep to the poor deceived Christians who are falling for the deception.
"But I have this against you, that you tolerate the woman Jezebel, who calls herself a prophetess and she teaches and leads My slaves astray to commit fornication and to eat idol sacrifices." (Rev. 2:20)
Balaam and Jezebel were two subtle, sneaky, underhanded, dupes of Satan carrying out schemes to corrupt God's people from within. They both weaponized idolatry and fornication. It is in this context Christ catches the sneakiness and warns His people.
In
Romans 14 and in
First Corinthian 8 - 11 the Apostle Paul does much of the same thing. He cautions the saints that their liberty in Christ can be used against them under the stealthy evil schemes of Satan. For this reason they should exercise love for one another and caution as to how their liberty in eating is not a cause of stumbling a brother or sister in Christ who is younger and more sensitive in conscience about diet.
I find more similarities in the two teachings then differences.