'Adjure' in the Bible

The king sent and called for Shimei, and said to him, "Didn't I adjure you by Yahweh, and warn you, saying, 'Know for certain, that on the day you go out, and walk abroad any where, you shall surely die?' You said to me, 'The saying that I have heard is good.'

The king said to him, "How many times do I have to adjure you that you speak to me nothing but the truth in the name of Yahweh?"