How did Jesus know that Zechariah had been murdered when the Old Testament never records it?

[Spindle4]

Jesus said it was in the past

You would think that sufficient to discard the suggestion that Jesus was speaking of something future.

(What did you see in the future, Jesus.?)

(I saw Myself crucified, and another Zecharias murdered. )

My preference is this guy:
Zec 1:1 In the eighth month of the second year of Darius, the word of the LORD came to Zechariah the son of Berechiah, the son of Iddo the prophet, saying,

 

[Tigger]

“that on you may come all the righteous blood shed on the earth, from the blood of righteous Abel to the blood of Zechariah, son of Berechiah, whom you murdered between the temple and the altar.”
-Matthew 23:35

Bible Gateway passage: Matthew 23:35 - New King James Version

that on you may come all the righteous blood shed on the earth, from the blood of righteous Abel to the blood of Zechariah, son of Berechiah, whom you murdered between the temple and the altar.

www.biblegateway.com

“In the eighth month of the second year of Darius, the word of the Lord came to Zechariah the son of Berechiah, the son of Iddo the prophet, saying,”
-Zechariah 1:1

Bible Gateway passage: Zechariah 1:1 - New King James Version

A Call to Repentance - In the eighth month of the second year of Darius, the word of the Lord came to Zechariah the son of Berechiah, the son of Iddo the prophet, saying,

www.biblegateway.com

The book of Zechariah never records Zechariah being murdered. How did Jesus know? What book of the Old Testament records his death?

”TRADITION!!!”