MAL 3:1

1 Hineni, I will send malachi, and he shall prepare the Derech before me: and HaAdon [(the L-rd)] [Moshiach], whom ye seek, shall suddenly come to His Heikhal, even the Malach HaBrit, in whom ye have chafetz [(delight)]: hinei, He is coming, saith Hashem Tzva'os.