'Firm' in the Bible

And Jehovah said to Satan, Hast thou considered my servant Job, that there is none like him on the earth, a perfect and an upright man, one that feareth God and abstaineth from evil? and still he remaineth firm in his integrity, though thou movedst me against him, to swallow him up without cause.

And his wife said to him, Dost thou still remain firm in thine integrity? curse God and die.

Hast thou with him spread out the sky, firm, like a molten mirror?

His heart is firm as a stone, yea, firm as the nether millstone.