Then Ezra rose and said to them: Here Ezra actually stood up in order to address the crowd.

You have broken the law and married foreign women, and so have increased the sin of Israel: The law is of course the Law of Moses. By marrying non-Jewish women, they disobeyed it (see Deut 7.3). In his prayer in 1 Esd 8.74-90, Ezra had spoken mostly of Israel’s sins in the past. Here he accuses the men of his own generation as adding to the history of Israel’s sins.

An alternative model for this verse is:

• Ezra then stood and said, “You have broken the Law! You have married foreign women [or, women who are not Jews], and have added to the list [or, stock/size/number] of Israel’s sins!

Contemporary English Version also has the following helpful model:

• I stood up and said:
You have broken God’s Law by marrying foreign women, and you have made the whole nation even more guilty than it already was.

Quoted with permission from Bullard, Roger A. and Hatton, Howard A. A Handbook on 1-2 Esdras. (UBS Helps for Translators). Miami: UBS, 2019. For this and other handbooks for translators see here.