Deuteronomy 32:17

17 They sacrificed to false gods, which are not God— gods they had not known, gods that recently appeared, gods your ancestors did not fear.

Read Deuteronomy 32:17 Using Other Translations

They sacrificed unto devils, not to God; to gods whom they knew not, to new gods that came newly up, whom your fathers feared not.
They sacrificed to demons that were no gods, to gods they had never known, to new gods that had come recently, whom your fathers had never dreaded.
They offered sacrifices to demons, which are not God, to gods they had not known before, to new gods only recently arrived, to gods their ancestors had never feared.