'Sealed It' in the Bible

Now those that sealed it were, Nehemiah, the governor, the son of Hacaliah, and Zedekiah,

And he wrote in king Ahasuerus' name, and sealed it with the king's ring, and sent letters by couriers on horseback, and riding on royal horses bred from swift horses:

And I signed the deed, and sealed it, and took witnesses, and weighed him the money in the balances.

And a stone was brought, and laid upon the mouth of the den; and the king sealed it with his own signet, and with the signet of his lords; that the purpose might not be changed concerning Daniel.