The prophet who proclaimed the new covenant of God with Israel and Judah was

The prophet who proclaimed the new covenant of God with Israel and Judah was Jeremiah. Jeremiah was a prophet who lived during the time of the Babylonian exile. He prophesied to the people of Judah and Jerusalem, warning them of the coming destruction and exile, but also giving them hope for the future. One of his most important prophecies was the announcement of a new covenant between God and Israel, which would be different from the old covenant made at Sinai. The new covenant would be written on people's hearts, and God's law would be internalized, rather than just external rules to be followed. This idea of a new covenant is significant in both Jewish and Christian theology, and is seen as a promise of a future redemption.