The day of vengeance, designed and purposed by me to take vengeance on the enemies of my church; or particularly the posterity of Esau. Day and year is all one, save the latter may have some respect to the length of their captivity. Is in mine heart; or, was in my heart; a desire of execution, Psalms 40:8. I have meditated or studied revenge; being long forborne, hath wrought in me resolutions of revenge; therefore wonder not that I am so bloody: noting the severity of his proceedings against his enemies. My redeemed: the Jews have this title, because he redeemed them out of Egypt, and would also out of Babylon. Is come; is at hand: see Psalms 102:13 Isaiah 34:8. The former part of the verse shows that Christ is still about his work, though he defer the execution till the fit time come; he may allude to the year of jubilee.
Related Commentaries of Isaiah 63:4
Isaiah 63:4
4 For the day of vengeance is in mine heart, and the year of my redeemed is come.