Balaam and Balak
The doctrine (dogma) of Balaam teaches people to cast a stumbling block before the children of Israel.
Rev 2:12-17 (KJV) 12 And to the angel of the church in Pergamos write; These things saith he which hath the sharp sword with two edges; 13 I know thy works, and where thou dwellest, even where Satan's seat is: and thou holdest fast my name, and hast not denied my faith, even in those days wherein Antipas was my faithful martyr, who was slain among you, where Satan dwelleth. 14 But I have a few things against thee, because thou hast there them that hold the doctrine of Balaam, who taught Balac to cast a stumblingblock before the children of Israel
Num 22:1-41 (KJV) 1 And the children of Israel set forward, and pitched in the plains of Moab on this side Jordan by Jericho. 2 And Balak the son of Zippor saw all that Israel had done to the Amorites. 3 And Moab was sore afraid of the people, because they were many: and Moab was distressed because of the children of Israel.
Num 25:1-18 (KJV) 1 And Israel abode in Shittim, and the people began to commit whoredom with the daughters of Moab. 2 And they called the people unto the sacrifices of their gods: and the people did eat, and bowed down to their gods. 3 And Israel joined himself unto Baalpeor: and the anger of the LORD was kindled against Israel. 4 And the LORD said unto Moses, Take all the heads of the people, and hang them up before the LORD against the sun, that the fierce anger of the LORD may be turned away from Israel. 5 And Moses said unto the judges of Israel, Slay ye every one his men that were joined unto Baalpeor.