The Messiah would make an unannounced appearance at the Jewish temple.

OT Prophecy NT Fulfillment
Malachi 3:1b
"Behold, I will send my messenger, and he shall prepare the way before me: and the LORD, whom ye seek, shall suddenly come to his temple, even the messenger of the covenant, whom ye delight in: behold, he shall come, saith the LORD of hosts."
Mark 11:15-16
"[11] He that hath ears to hear, let him hear. [16] But whereunto shall I liken this generation? It is like unto children sitting in the markets, and calling unto their fellows,"

Tanakh - Neviim - Malachi 3:1b

"Behold, I send My messenger, and he shall clear the way before Me; and the L-rd, whom ye seek, will suddenly come to His temple, and the messenger of the covenant, whom ye delight in, behold, he cometh, saith HaShem of hosts."

Hebrew OT - Malachi 3:1b

אובי םאתפו ינפל ךרד-הנפו יכאלמ חלש יננה
תירבה ךאלמו םישקבמ םתא -רשא ןודאה ולכיה-לא
.תואבצ הוהי רמא אב-הנה םיצפח םתא-רשא

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