TSK · Ezra 9:15

"'If they confess their iniquity, and the iniquity of their fathers, in their trespass which they trespassed against me, and also that, because they walked contrary to me,

They came to the children of Reuben, and to the children of Gad, and to the half-tribe of Manasseh, to the land of Gilead, and they spoke with them, saying,

and found his heart faithful before you, and made a covenant with him to give the land of the Canaanite, the Hittite, the Amorite, and the Perizzite, and the Jebusite, and the Girgashite, to give it to his seed, and have performed your words; for you are righteous.

"Truly I know that it is so, but how can man be just with God?

If you, Yah, kept a record of sins, Lord, who could stand?

For we have all become as one who is unclean, and all our righteousness is as a polluted garment: and we all fade as a leaf; and our iniquities, like the wind, take us away.

[It is of] Yahweh's loving kindnesses that we are not consumed, because his compassion doesn't fail.

Lord, righteousness belongs to you, but to us confusion of face, as at this day; to the men of Judah, and to the inhabitants of Jerusalem, and to all Israel, who are near, and who are far off, through all the countries where you have driven them, because of their trespass that they have trespassed against you.

Now Joshua was clothed with filthy garments, and was standing before the angel.

I said therefore to you that you will die in your sins; for unless you believe that I am he, you will die in your sins."

For being ignorant of God's righteousness, and seeking to establish their own righteousness, they didn't subject themselves to the righteousness of God.