'Took an Oath' in the Bible

Joseph took an oath of the children of Israel, saying, "God will surely visit you, and you shall carry up my bones from here."

As the LORD your God lives, there is no nation or kingdom, where my lord has not sent to seek you. When they said, 'He is not here,' he took an oath of the kingdom and nation, that they did not find you.

In the seventh year Jehoiada sent and fetched the captains over hundreds of the Carites and of the guard, and brought them to him into the house of the LORD; and he made a covenant with them, and took an oath of them in the house of the LORD, and showed them the king's son.

Then they said, "We will restore them, and will require nothing of them; so will we do, even as you say." Then I called the priests, and took an oath of them, that they would do according to this promise.