ESV: For Ezra had set his heart to study the Law of the Lord, and to do it and to teach his statutes and rules in Israel.
NIV: For Ezra had devoted himself to the study and observance of the Law of the Lord, and to teaching its decrees and laws in Israel.
NASB: For Ezra had firmly resolved to study the Law of the Lord and to practice it, and to teach His statutes and ordinances in Israel.
CSB: Now Ezra had determined in his heart to study the law of the Lord, obey it, and teach its statutes and ordinances in Israel.
NLT: This was because Ezra had determined to study and obey the Law of the Lord and to teach those decrees and regulations to the people of Israel.
KJV: For Ezra had prepared his heart to seek the law of the Lord, and to do it, and to teach in Israel statutes and judgments.
NKJV: For Ezra had prepared his heart to seek the Law of the Lord, and to do it, and to teach statutes and ordinances in Israel.