וַיֹּ֕אמֶר אָנֹכִ֥י הָאֵ֖ל אֱלֹהֵ֣י אָבִ֑יךָ אַל־תִּירָא֙ מֵרְדָ֣ה מִצְרַ֔יְמָה כִּֽי־לְג֥וֹי גָּד֖וֹל אֲשִֽׂימְךָ֥ שָֽׁם׃
하나님이 가라사대 나는 하나님이라 네 아비의 하나님이니 애굽으로 내려가기를 두려워 말라 내가 거기서 너로 큰 민족을 이루게 하리라
Rashi
אל תירא מרדה מצרימה FEAR NOT TO GO DOWN TO EGYPT — God said this to him because he was grieved that he was compelled to leave the Land of Israel (Pirkei DeRabbi Eliezer 39).
Chizkuni
אלוקי אביך, “the G-d of your father.” G-d appeared to Yaakov in the same mode as Yaakov had addressed him, i.e. this is why He describes Himself as “the G-d of your father “
Sforno
I am … God of your father. I am the God who told your father not to go to Egypt (26:2), yet I am telling you to go. There I will make you into a great nation. Whereas if you remain here your offspring will intermarry with the Canaanites. This will not happen in Egypt because the populace will not even eat with the Hebrews; see 43:32