Now therefore let us make a covenant with our God to put away all the wives, and such as are born of them, according to the ... commandment of our God. 10:3
Trivia: Why did Ezra pull out the hairs on his head and beard?
The Israelites offend God by "taking" foreign wives and thereby corrupting "the holy seed." 9:2
Ezra tells the men that they must abandon their wives and children if they are to avoid God's wrath. 10:2-3, 10-12