Numbers 5:18

5:18 Then the priest will have the woman stand before the Lord, uncover the woman’s head, and put the grain offering for remembering in her hands, which is the grain offering of suspicion. The priest will hold in his hand the bitter water that brings a curse. ¹ 

Deuteronomy 22:5

22:5 A woman must not wear men’s clothing, ²  nor should a man dress up in women’s clothing, for anyone who does this is offensive ³  to the Lord your God.

[5:18]  ¹ tn The expression has been challenged. The first part, “bitter water,” has been thought to mean “water of contention” (so NEB), but this is not convincing. It has some support in the versions which read “contention” and “testing,” no doubt trying to fit the passage better. N. H. Snaith (Leviticus and Numbers [NCB], 129) suggests from an Arabic word that it was designed to cause an abortion – but that would raise an entirely different question, one of who the father of a child was. And that has not been introduced here. The water was “bitter” in view of the consequences it held for her if she was proven to be guilty. That is then enforced by the wordplay with the last word, the Piel participle הַמְאָרֲרִים (ham’ararim). The bitter water, if it convicted her, would pronounce a curse on her. So she was literally holding her life in her hands.

[22:5]  ² tn Heb “a man’s clothing.”

[22:5]  ³ tn The Hebrew term תּוֹעֵבָה (to’evah, “offense”) speaks of anything that runs counter to ritual or moral order, especially (in the OT) to divine standards. Cross-dressing in this covenant context may suggest homosexuality, fertility cult ritual, or some other forbidden practice.