לֹא־תִרְאֶה֩ אֶת־חֲמ֨וֹר אָחִ֜יךָ א֤וֹ שׁוֹרוֹ֙ נֹפְלִ֣ים בַּדֶּ֔רֶךְ וְהִתְעַלַּמְתָּ֖ מֵהֶ֑ם הָקֵ֥ם תָּקִ֖ים עִמּֽוֹ׃ (ס)
זאָלט ניט זען דײַן ברודערס אײזל אָדער זײַן אָקס געפֿאַלן אין װעג, און זיך פֿאַרהױלן פֿון זײ; אױפֿשטעלן זאָלסטו זײ אױפֿשטעלן אין אײנעם מיט אים.
Rashi
הקם תקים [THOU SHALT NOT SEE THY BROTHER’S ASS OR ANY OF HIS HERD FALL DOWN BY THE WAY, AND HIDE THYSELF FROM THEM] THOU SHALT SURELY RAISE UP — This refers to the duty of loading — to re-load the burden that fell from it.
Chizkuni
או שורו נופלים בדרך, “or his donkey or ox collapsing on the way,” [due to having been overloaded, Ed.] even though the owner is someone who hates you, you must not ignore this, but assist them in helping the animal to get up.
Ibn Ezra
fallen down is parallel in meaning to “lying” [Exodus 23: 5]; the former is simply a more general term.
Tur HaArokh
צוטריטלעך נאָר פֿאַר פּרעמיום־מיטגלידערRabbeinu Bahya
צוטריטלעך נאָר פֿאַר פּרעמיום־מיטגלידערSiftei Chakhamim
צוטריטלעך נאָר פֿאַר פּרעמיום־מיטגלידערRav Hirsch
צוטריטלעך נאָר פֿאַר פּרעמיום־מיטגלידערRashi
עמו [THOU SHALT SURELY UPLOAD] WITH HIM — i.e. with the owner. But if he goes aside and sits down and says to him, “Since it is a duty for you to load it, if you want to load, go ahead and load!” — [“I” am not commanded to do it”], he is exempt from doing it (cf. Bava Metzia 32a).