'Sure' in the Bible

I will raise me up a faithful priest, that shall do according to that which is in my heart and in my mind. I will build him a sure house; and he shall walk before my anointed forever.

Please go make yet more sure, and know and see his place where his haunt is, [and] who has seen him there; for it is told me that he deals very subtly.

Please forgive the trespass of your handmaid. For Yahweh will certainly make my lord a sure house, because my lord fights the battles of Yahweh; and evil shall not be found in you all your days.