פירוש על שמות 6:6

לכן THEREFORE, i. e. in accordance with the tenor of that oath (cf. Exodus Rabbah 6)

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.

'לכן אמור לבני ישראל אני ה. The Torah speaks of three reasons (stages of the redemption) why G’d at this time reveals knowledge about Himself which He had not revealed previously.