This is one of the worst cases I have ever seen of reading the Son into a text. Verses 5 & 7-10 are all referring to YHWH (Yeshua's Father - Psalm 2:7).
Both the Father and the Son are called YHWH in the OT not just in the NT case of Hebrews 8 -- the Father is not the "High Priest" of Hebrews 8. See the details in the chapter
Hebrews 8
just as Moses was warned
by God when he was about to erect the tabernacle; for, “See,” He (Christ) says, “that you make all things according to the pattern which was shown you on the mountain.” 6 But now
He (Christ)
has obtained a more excellent ministry, by as much as He (Christ) is also the mediator of a better covenant, which has been enacted on better promises.
7 For if that first
covenant had been faultless, there would have been no occasion sought for a second.
8 For finding fault with them,
He (
Christ) says,
“Behold, days are coming, says the Lord (YHWH),
When I (Christ) will effect a new covenant
With the house of Israel and with the house of Judah;
9 Not like
the covenant which I (Christ) made with their fathers
For they did not
continue in My (Christ's) covenant,
And I did not care for them, says the Lord (Christ).
10 “For this is the covenant that I will make with the house of Israel
After those days, says the Lord:
I will put My laws into their minds,
And I will write them on their hearts.
And I will be their God,
And they shall be My people.
Many texts in the NT where the OT YHWH is applied to Christ
And here is why
It was Christ at Sinai according to Hebrews 8.
It was Christ "every day" in the wilderness wanderings of Israel.
1 Cor 10
For I do not want you to be unaware, brethren, that our fathers were all under the cloud and all passed through the sea; 2 and all were baptized into Moses in the cloud and in the sea; 3 and all ate the
same spiritual food; 4 and all drank
the same spiritual drink, for they were drinking from a spiritual rock which followed them; and the
Rock was Christ
So that is "Christ" saying "
Do not take God's name in vain" Ex 20:7 according to Hebrews 8.
Please list those verses.
You are looking at a great example of one.
Note "the details"
Hebrews 8
just as Moses was warned
by God when he was about to erect the tabernacle; for, “See,” He (Christ) says, “that you make all things according to the pattern which was shown you on the mountain.” 6 But now
He (Christ)
has obtained a more excellent ministry, by as much as He (Christ) is also the mediator of a better covenant, which has been enacted on better promises.
7 For if that first
covenant had been faultless, there would have been no occasion sought for a second.
8 For finding fault with them,
He (
Christ) says,
“Behold, days are coming, says the Lord (YHWH),
When I (Christ) will effect a new covenant
With the house of Israel and with the house of Judah;
9 Not like
the covenant which I (Christ) made with their fathers
For they did not
continue in My (Christ's) covenant,
And I did not care for them, says the Lord (Christ).
10 “For this is the covenant that I will make with the house of Israel
After those days, says the Lord:
I will put My laws into their minds,
And I will write them on their hearts.
And I will be their God,
And they shall be My people.
In that example we see "consistency" -- but some would point out that by inserting whatever they wish to munge the text into "not Christ speaking" they can get to their preferred text. How "instructive"