'Hereby' in the Bible

"Because of all this, we are making a binding agreement, putting it in writing, and our leaders, our descendants of Levi, and our priests hereby set their seals upon it."

hereby participate with their colleagues the town leaders and enter into a curse and an oath to adhere to the law of God which was given through Moses the servant of God, and to obey carefully all the commandments of the LORD our Lord, along with his ordinances and his statutes.