Zechariah 3
1 Then he showed me Joshua the high priest standing before the angel of the LORD, and Satan standing at his right hand to accuse him.
The Angel of the LORD (malak Yahweh) in v.1 is simply referred to as Yahweh in v.2. This shows clearly that malak Yahweh is Yahweh, or least one person of the Trinitarian Yahweh. Notice how Yahweh refers to Himself using his own name i.e. "And Yahweh said to Satan, 'Yahweh rebukes you...'". This is very similar to the archangel Michael talking to Satan in Jude 1:9. Since there is only one archangel, and his name is Michael, then the Angel of the LORD is the same as the archangel who is Michael. Michael is therefore the "angel of the covenant" (Malachi 3:1) who is Christ Himself.
2 And the LORD said to Satan, "The LORD rebuke you, O Satan! The LORD who has chosen Jerusalem rebuke you! Is not this a brand plucked from the fire?"
3 Now Joshua was standing before the angel, clothed with filthy garments.
4 And the angel said to those who were standing before him, "Remove the filthy garments from him." And to him he said, "Behold, I have taken your iniquity away from you, and I will clothe you with pure vestments."
5 And I said, "Let them put a clean turban on his head." So they put a clean turban on his head and clothed him with garments. And the angel of the LORD was standing by.
6 And the angel of the LORD solemnly assured Joshua,
7 "Thus says the LORD of hosts: If you will walk in my ways and keep my charge, then you shall rule my house and have charge of my courts, and I will give you the right of access among those who are standing here.
8 Hear now, O Joshua the high priest, you and your friends who sit before you, for they are men who are a sign: behold, I will bring my servant the Branch.
9 For behold, on the stone that I have set before Joshua, on a single stone with seven eyes, I will engrave its inscription, declares the LORD of hosts, and I will remove the iniquity of this land in a single day.
The only one other use of "seven eyes" in the Bible is found in Revelation 5:6.
10 In that day, declares the LORD of hosts, every one of you will invite his neighbor to come under his vine and under his fig tree."