Tosefta zu Jirmejahu 3:2

A man shouldn't marry a wife until his niece is grown up or until he finds someone appropriate for him, as it is said, "The land was full of lust" (Vayikra 19:29). "It is lust" (Vayikra 20:14). Rabbi Eliezer says: This is a single man who has sex with a single woman not for the sake of marriage. Rabbi Eliezer said: From where do we know that he [the single man from the previous statement] is punished before God like the one who has sex with a woman and her mother? It is said here "Lust" and it is said there "A man who marries a woman and her mother—it is lust" (Vayikra 20:14). Rabbi Eliezer ben Ya'akov says: Because he has sex with many women and it is not known with which he has had sex; and she receives it from many men and it is not known from which of them she received it—it turns out that this man marries his daughter, this one marries his sister, and all of the world will be bastards. That's why it is said, "The earth will be full of lust" (zimah)—this one, what is he (zeh mah hu)? He is not a kohen, levi or Yisrael (sic! placement of this line based on Ehrfurt manuscript and the derash of זימה = זה מה). Rabbi Yehudah (sic! based on Ehrfurt manuscript) says: Behold it says "Do not prostitute the land" (Vayikra 19:29)—the produce degenerates. The Hakhamim decided by majority to support Rabbi Yehudah (sic!): "Lift your eyes to the lowlands and see where you have not been ravished... and the rains have been withheld" (Yirmiyahu 3:2-3) [i.e. your sexual immorality directly causes the rains to stop and the produce to degenerate].