Kabbalah zu Mischlej 7:5

Another explanation, A king is "a woman who fears Hashem," as it is written, "A woman who fears Hashem, she shall be praised" (Mishlei 31:30). A tilled field is a strange woman, (the Sitra Achra) as it is written, "That they may keep you from the strange woman" (Mishlei 7:5). For there is a field, and there is a field. There is a field in which all blessings and holiness dwell, as it is written, "Like the smell of a field which Hashem has blessed". And there is a field in which destruction and defilement, extinction, killings and war reside. This king sometimes tills the second field, as it is written, "For three things the earth the earth is disquieted...and a handmaid that is heir to her mistress" (Mishlei 30:21) is covered and darkened until it is purified and joins (Zeir Anpin) above.