'Sure' in the Bible

So I stood beside him, and slew him, because I was sure that he could not live after that he was fallen: and I took the crown that was upon his head, and the bracelet that was on his arm, and have brought them hither unto my lord.

And thy house and thy kingdom shall be made sure for ever before thee: thy throne shall be established for ever.

Verily my house is not so with God; Yet he hath made with me an everlasting covenant, Ordered in all things, and sure: For it is all my salvation, and all my desire, Although he maketh it not to grow.