'Necessary' in the Bible

And David said to his son Solomon, Be strong and of a good heart and do your work; have no fear and do not be troubled, for the Lord God, my God, is with you; he will not give you up, and his face will not be turned away from you, till all the work necessary for the house of the Lord is complete.

and give to my son Solomon a perfect heart to keep Your commandments, Your testimonies, and Your statutes, and to do all [that is necessary] to build the temple [for You], for which I have made provision.”