What did God promise the Israelites after their rescue from Babylon to make them fear Him for ever?

After their rescue from Babylon, God promised the Israelites a new covenant and a new spirit to make them fear Him forever. This promise was given through the prophet Jeremiah, who told the Israelites that God would write His laws on their hearts and forgive their sins. This new covenant would be different from the old one, which the Israelites had broken. God promised that He would be their God, and they would be His people, and they would no longer need to teach one another to know Him, for they would all know Him, from the least to the greatest. Through this new covenant, God would give them a new spirit, one that would help them to keep His commands and follow His ways.