Numbers 25:1 MSG

[1] While Israel was camped at Shittim (Acacia Grove), the men began to have sex with the Moabite women. It started when the women invited the men to their sex-and-religion worship. They ate together and then worshiped their gods. Israel ended up joining in the worship of the Baal of Peor. God was furious, his anger blazing out against Israel.