John Gill Commentary Zechariah 1:10

"And the man that stood among the myrtle-trees answered and said, These are they whom Jehovah hath sent to walk to and fro through the earth." — Zechariah 1:10 (ASV)

And the man that stood among the myrtle trees answered and said And so prevented the angel from giving the account he was about to give; and who was more capable of it, and which to do was great condescension in him, and was doing the prophet a singular honour: these [are they] whom the Lord has sent to walk to and fro through the earth; which is a description of the angels, the ministering spirits sent forth by God to take their tour throughout the earth; not to do mischief, as Satan does; but to do good to kingdoms, nations, and men in general, and to the heirs of salvation in particular; for which they are commissioned and empowered of God; see (Hebrews 1:14).