Numbers 5:22

לצבות בטן is the same as לְהַצְבּוֹת בטן (the verb being the Hiphil infinitive). This is the usage of the Patach: that the “lamed” has it as its vowel instead of the ה having it (viz., that it is a contraction of לה). Similar is (Exodus 13:21) לַרְאתכם הדרך and (Deuteronomy 1:33) לַנְחֹתָם בדרך אשר הלכו בה (which are equivalent to לְהַרְאֹתְכֶם and לְהַנְחֹתָם). And so, too, in this verse, לַנְפִּל ירך, which is the same as לְהַנְפִּיל ירך. The meaning is: that the waters cause the belly to swell, and cause the thigh to fall. לצבות בטן ולנפל ירך [AND THIS WATER THAT CAUSETH THE CURSE SHALL GO INTO THY BOWELS] TO MAKE THE BELLY TO SWELL AND THE THIGH TO WASTE — i.e. the belly and the thigh of the adulterer (Note that Scripture does not state here, as in the preceding verse, “thy thigh”, “thy belly”). Or perhaps this is not so, but it means those of the adulteress? But when it states, (v. 21) “[when the Lord doth make] thy thigh to waste and thy belly to swell”, you see, that those of the adulteress are mentioned already (Sotah 28a; cf. Sifrei Bamidbar 15:1). אמן אמן [AND THE WOMAN SHALL SAY] AMEN, AMEN — The utterance of the word אמן by a person implies the acceptance of an oath which has been recited by another with reference to him. — The two words אמן (which may mean “It is so”, or, “May it be so”) respectively signify, “Amen” with reference to the curse invoked, and “Amen” with reference to the oath recited. Accordingly she declares: “Amen” (“may it be so” i. e., may the אלה “the curse” befall me) if I have received defilement from this man, and “Amen” if I have received defilement from any other man; “Amen” (“It is so” — the terms of the oath are true) that I have not gone astray either when I was betrothed to my husband or since I have been married to him; (or in the case of a woman who has married her deceased husband’s brother; cf. Deuteronomy 25:7, it implies), “either when I was awaiting marriage with my brother-in-law or after I was married to him” (Sotah 18a).

וּ֠בָ֠אוּ הַמַּ֨יִם הַמְאָרְרִ֤ים הָאֵ֙לֶּה֙ בְּֽמֵעַ֔יִךְ לַצְבּ֥וֹת בֶּ֖טֶן וְלַנְפִּ֣ל יָרֵ֑ךְ וְאָמְרָ֥ה הָאִשָּׁ֖ה אָמֵ֥ן ׀ אָמֵֽן׃

and this water that causes the curse shall go into thy bowels, to make thy belly to swell, and thy thigh to fall away: And the woman shall say, Amen, amen.