Kabbalah zu Mischlej 5:4

It also says in the Midrash of Mishlei (Proverbs): “For the lips of a strange woman drop honey, and her mouth is smoother than oil” (Proverbs 5:3). My son, be careful from a harlot that she won’t mislead you with her lips and that she won’t lure you with her voice. Why? Because “her end is bitter as wormwood, sharp as a two-edged sword” (Proverbs 5:4), and just like the sword eats on both ends, so too a harlot makes man lose his life in this world and in the World to Come., as it says “Her feet go down to death” (ibid.) since she brings him down to the depths of death, and this is great torture; “her steps take hold on the nether-world” (ibid.), even though he is judged with great torture in this world he is not saved from the judgment of hell.