א֣וֹ אִ֗ישׁ אֲשֶׁ֨ר תַּעֲבֹ֥ר עָלָ֛יו ר֥וּחַ קִנְאָ֖ה וְקִנֵּ֣א אֶת־אִשְׁתּ֑וֹ וְהֶעֱמִ֤יד אֶת־הָֽאִשָּׁה֙ לִפְנֵ֣י יְהוָ֔ה וְעָ֤שָׂה לָהּ֙ הַכֹּהֵ֔ן אֵ֥ת כָּל־הַתּוֹרָ֖ה הַזֹּֽאת׃
ou si un homme, assailli d’un esprit de jalousie, avait soupçonné sa femme: il la placera en présence du Seigneur, et le pontife lui appliquera cette règle en tout point.
Rashi
If one wrote one letter and erased one letter - onto the water, and then wrote the next letter and erased it, until [in this way] completing [the text] in its entirety, as it is written "all this ritual" [Numbers 5:30] -- that it all be [together] as one.
Rashi
For her sake - in a scroll by itself, as it is written, "and he shall carry out with her" [Numbers 5:30] -- for her sake.
Bartenura
ואין מגילתה כשרה לשקות [בה] סוטה אחרת – for we require writing for her sake, as it is written (there – Numbers 5:30): “and the priest shall carry out [all this ritual with her].” All of the carrying out of the ritual is for her sake.