'Spiritual' in the Bible

When the Lord first spoke through Hosea, he said to him, "Go marry a prostitute who will bear illegitimate children conceived through prostitution, because the nation continually commits spiritual prostitution by turning away from the Lord."

Prostitution, wine, and new wine take away the mind and the [spiritual] understanding.

They consult their wooden idols, and their diviner's staff answers with an oracle. The wind of prostitution blows them astray; they commit spiritual adultery against their God.

The days of visitation are come, the days of recompence are come; Israel shall know it: the prophet is a fool, the spiritual man is mad, for the multitude of thine iniquity, and the great hatred.