And I will bring you in unto the land, concerning the which I did swear to give it to Abraham, to Isaac, and to Jacob; and I will give it you for an heritage: I am the LORD. Which I did swear - נשאתי את ידי nasathi eth yadi, I have lifted up my hand. The usual mode of making an appeal to God, and hence considered to be a form of swearing. It is thus that Isaiah 62:8 is to be understood: The Lord hath sworn by his right hand, and by the arm of his strength.
Related Commentaries of Exodus 6:8
Exodus 6:8
8 And I will bring you in unto the land, concerning the which I did swearb to give it to Abraham, to Isaac, and to Jacob; and I will give it you for an heritage: I am the LORD.