Rashi on Zechariah
abstaining To abstain from pleasure, as I have done these seventy years. The word נְזִירָה always means separation.
Radak on Zechariah
To say to the house of the LORD — meaning, "in the house of the LORD." And Targum Jonathan translates as "who were serving in the Holy Temple of the LORD."
Radak on Zechariah
And to the prophets — Haggai, Zechariah, and Malachi. And Targum Jonathan translates as "and to the scribes."