Rashi: "If ¹ there passes over a man a spirit of jealousy'.

Seforno: It means 'Or if a spirit of jealousy passes over man' - without good reason. ²

Seforno: To reassure him that he need not be concerned about erasing the Name of Hashem.

Megilah, 20b: To teach us via a Gezeirah Shavah "Torah" "Torah" from the Pasuk in Shoftim, 17:11 "Al-Pi ha'Torah asher Yorucha ve'al ha'Mishpat" - that just as there, "Mishpat" applies all day, ¹ so too is "Torah" - written there and with reference to the current Pasuk, applicable all day (and that, just as there - by Zakein Mamrei - it is speaking about the Sanhedrin ha'Gadol of seventy-one, so too here by Sotah, does the husband take her to the Sanhedrn ha'Gadol - Sotah, 7b ² and that, based on the same Gezeirah Shavah, a Megilas Sotah that is written in the nght2 is Pasul - Sotah, 17b). ³

Sotah, 18a: "Kol ha'Torah ha'Zos" implies that the entire Megilah must be written before the Kohen erases any letters - and that if he writes a letter and erases it, writes a letter and erases it, it is Pasul..

Rashi (in Sotah, 18a): To teach us that the Megilas Sotah must be written li'Shemah. ¹