לְ֠שַׁלַּח אִ֣ישׁ אֶת־עַבְדּ֞וֹ וְאִ֧ישׁ אֶת־שִׁפְחָת֛וֹ הָעִבְרִ֥י וְהָעִבְרִיָּ֖ה חָפְשִׁ֑ים לְבִלְתִּ֧י עֲבָד־בָּ֛ם בִּיהוּדִ֥י אָחִ֖יהוּ אִֽישׁ׃
afin que chacun remit en liberté son esclave et chacun sa servante, d’origine hébreue, afin que nul ne retînt dans la servitude son frère judéen.
Ibn Ezra
מוטה Yoke. Comp. מוטות עלכם the bands of your yoke (Lev. 26:13). To loose the bands, etc. To make the slaves free. Comp. Jer. 1:34.
Radak
ועבדום, the Egyptians will enslave them, and will oppress them. It is not unusual to apply the prefix ב to people who have been enslaved, as we find a similar construction in Leviticus 25,39 לא תעבוד בו עבודת עבד, “do not make him perform the menial duties performed by a slave.” Or Jeremiah 34,10, לבלתי עבד בם, “not to keep them enslaved.” The word עבדם i.e. עבודה is used to describe the status of the person described, whereas the word וענו refers to the manner in which such slaves would be treated.