'Committed Adultery' in the Bible

For their mother has committed adultery; she who conceived them has acted shamefully. For she said, "I will seek out my lovers; they are the ones who give me my bread and my water, my wool, my flax, my olive oil, and my wine.

Do not thou triumph, O Israel; make no boasting more than the Heathen. For thou hast committed adultery against thy God: strange rewards hast thou loved, more than all the corn floors.