'Confirm' in the Bible

And queen Esther the daughter of Abihail, and Mordecai the Jew, wrote with all authority to confirm this second letter of Purim.

to confirm these days of Purim in their fixed times, according as Mordecai the Jew and queen Esther had enjoined them, and as they had decreed for themselves and for their seed, as to the matters of the fastings and their cry.