לָכֵ֞ן אֱמֹ֥ר לִבְנֵֽי־יִשְׂרָאֵ֘ל אֲנִ֣י יְהוָה֒ וְהוֹצֵאתִ֣י אֶתְכֶ֗ם מִתַּ֙חַת֙ סִבְלֹ֣ת מִצְרַ֔יִם וְהִצַּלְתִּ֥י אֶתְכֶ֖ם מֵעֲבֹדָתָ֑ם וְגָאַלְתִּ֤י אֶתְכֶם֙ בִּזְר֣וֹעַ נְטוּיָ֔ה וּבִשְׁפָטִ֖ים גְּדֹלִֽים׃
Karena itu, katakanlah kepada orang Israel: Akulah Yang Mahakekal. Aku akan membawa kamu keluar dari bawah beban kerja paksa orang Mesir, Aku akan melepaskan kamu dari perbudakan mereka, dan Aku akan menebus kamu dengan lengan yang terulur serta dengan hukuman-hukuman yang besar.
Rashi
לכן THEREFORE, i. e. in accordance with the tenor of that oath (cf. Exodus Rabbah 6)
Ramban
AND I WILL BRING YOU OUT FROM UNDER THE BURDENS OF THE EGYPTIANS. He assured them that He will take them out from the land of the Egyptians and that they will no longer suffer from their heavy burden.
Kli Yakar
I will bring you out, I will save you, I will redeem you, and I will take you. These correspond to the four things that happened to them, as it is said (Genesis 15:13), Your offspring shall be strangers — this refers to their status as foreigners; in a land not their own — this refers to the distance from the Divine Presence, for one who dwells outside the Land of Israel is like one who has no God, etc. (Ketubot 110b). And the text places the distance from the Divine Presence next to their status as foreigners because one depends on the other — the distance from the Divine Presence stems from their being foreigners outside the Land of Israel, in a place distant from the Divine Presence. And they shall serve them — this is something additional to being foreigners, for a typical foreigner is at least not a slave. And they shall afflict them — this is something additional to slavery, for a typical slave is not afflicted without reason.
In the redemption, the Holy One, blessed be He, saw fit to save them gradually, bit by bit. First, He saved them from the most dangerous thing, which was affliction, and about this it is said, I will bring you out from under the burdens of Egypt, for burdens refers to affliction, as it is written, to afflict them with their burdens. And afterward, He saved them from slavery as well, and about this it is said, I will save you from their labor. And afterward, He saved them from the lightest of all, which was their status as foreigners, and about this it is said, I will redeem you, etc., for a typical foreigner has no redeemer, as it is written (Numbers 5:8), If the man has no redeemer, which our Sages interpreted (Bava Kamma 109a) as referring to a foreigner, etc.
In the redemption, the Holy One, blessed be He, saw fit to save them gradually, bit by bit. First, He saved them from the most dangerous thing, which was affliction, and about this it is said, I will bring you out from under the burdens of Egypt, for burdens refers to affliction, as it is written, to afflict them with their burdens. And afterward, He saved them from slavery as well, and about this it is said, I will save you from their labor. And afterward, He saved them from the lightest of all, which was their status as foreigners, and about this it is said, I will redeem you, etc., for a typical foreigner has no redeemer, as it is written (Numbers 5:8), If the man has no redeemer, which our Sages interpreted (Bava Kamma 109a) as referring to a foreigner, etc.