Scholars insist that the messianic concept was introduced during the age of the prophets. They note that the messianic concept is not explicitly mentioned anywhere in the Torah (the first five books of the Bible).
However, traditional Judaism maintains that the messianic idea has always been a part of Judaism. The Messiah is not mentioned explicitly in the Torah, because the Torah was written in terms that all people could understand, and the concept of a distant, spiritual, future reward was beyond the comprehension of some people. However, the Torah contains several references to "the End of Days" which is the time of the Messiah, thus the concept was known in the most ancient times. The fact that Jews are stuck almost solely in the first five books of the bible (Torah) is clearly the reason of how and why the knowledge and understanding of what has been referred to in Isaiah and in the writings of other prophets has been missed and glossed over historically by the Jews. In terms of the desire for an end of wickedness and sin how would that ever happen? How could the Jewish people overlook the concept of Passover and countless centuries of sacrifice and blood letting done for deliverance from bondage and as an expiation for sin had that not had greater significance in God's overall plan?
(Isaiah 52: 13 - 15 and Isaiah 53) Behold, my servant shall prosper, he shall be exalted and lifted up, and shall be very high. As many were astonished at him his appearance was so marred, beyond human semblance, and his form beyond that of the sons of men, so shall he startle many nations; kings shall shut their mouths because of him; for that which has not been told them they shall see, and that which they have not heard they shall understand.
When he opened the sixth seal, I looked, and behold, there was a great earthquake; and the sun became black as sackcloth, the full moon became like blood, and the stars of the sky fell to the earth as the fig tree sheds its winter fruit when shaken by a gale; the sky vanished like a scroll that is rolled up, and every mountain and island was removed from its place. Then the kings of the earth and the great men and the generals and the rich and the strong, and every one, slave and free, hid in the caves and among the rocks of the mountains, calling to the mountains and rocks, “Fall on us and hide us from the face of him who is seated on the throne, and from the wrath of the Lamb; for the great day of their wrath has come, and who can stand before it?”
“On that day I will make the clans of Judah like a blazing pot in the midst of wood, like a flaming torch among sheaves; and they shall devour to the right and to the left all the peoples round about, while Jerusalem shall still be inhabited in its place, in Jerusalem.
“And the Lord will give victory to the tents of Judah first, that the glory of the house of David and the glory of the inhabitants of Jerusalem may not be exalted over that of Judah. On that day the Lord will put a shield about the inhabitants of Jerusalem so that the feeblest among them on that day shall be like David, and the house of David shall be like God, like the angel of the Lord, at their head. And on that day I will seek to destroy all the nations that come against Jerusalem.
“And I will pour out on the house of David and the inhabitants of Jerusalem a spirit of compassion and supplication, so that, when they look on him whom they have pierced, they shall mourn for him, as one mourns for an only child, and weep bitterly over him, as one weeps over a first-born.
(Zechariah 13) “On that day there shall be a fountain opened for the house of David and the inhabitants of Jerusalem to cleanse them from sin and uncleanness.