וּשְׂנֵאָהּ֮ הָאִ֣ישׁ הָאַחֲרוֹן֒ וְכָ֨תַב לָ֜הּ סֵ֤פֶר כְּרִיתֻת֙ וְנָתַ֣ן בְּיָדָ֔הּ וְשִׁלְּחָ֖הּ מִבֵּית֑וֹ א֣וֹ כִ֤י יָמוּת֙ הָאִ֣ישׁ הָאַחֲר֔וֹן אֲשֶׁר־לְקָחָ֥הּ ל֖וֹ לְאִשָּֽׁה׃
그 후부도 그를 미워하여 이혼 증서를 써서 그 손에 주고 그를 자기 집에서 내어 보내었거나 혹시 그를 아내로 취한 후부가 죽었다 하자
Bartenura
ונותן לה את הפרה – as he is not able to cut it after it is written, as it is written (Deuteronomy 24:3); “[then this latter man rejects her,] writes her a bill of divorcement, hands it to her [and sends her away from his house;…” which is not requiring other than writing and giving [the Jewish bill of divorce], excluding the situation which is requiring the writing [of the Jewish bill of divorce], cutting it [from where it was written] and giving it [to the woman].
English Explanation of Mishnah Eruvin
One may write on them gittin, But Rabbi Yose the Galilean declares it unfit. One can write a get on animal, for instance on the horn of a cow, and then divorce one’s wife by giving her the cow (see Gittin 2:3). Rabbi Yose the Galilean says that such a get is invalid because it is not like a scroll, specifically mentioned as the divorce document in Deuteronomy 24:3.
Rashi
“For her” is written twice - [the other time following] "then this latter man rejects her" etc. (Deuteronomy 24:3)