The Sages have said:

Does not atonement come through the blood, as it is said: For it is the blood that maketh atonement by reason of the life!

Babylonian Talmud

Babylonian Talmud, Yoma 5a referring to Vayikra (Lev.) 17:11 in the Tanakh

The Sages have said:

I may remark then, that our Rabbis with one voice accept and affirm the opinion that the prophet is speaking of the King Messiah, and we ourselves shall adhere to the same view.

Rabbi Mosheh El-Sheikh

[Rabbi Mosheh El-Sheikh regarding Yesha’yahu 53 in the Tanakh]