Ezra 4:2

4:2 they came to Zerubbabel and the leaders and said to them, “Let us help you build, for like you we seek your God and we have been sacrificing to him from the time of King Esarhaddon of Assyria, who brought us here.”

Ezra 9:12

9:12 Therefore do not give your daughters in marriage to their sons, and do not take their daughters in marriage for your sons. Do not ever seek their peace or welfare, so that you may be strong and may eat the good of the land and may leave it as an inheritance for your children forever.’