'Need' in the Bible

When Jesus heard it, he saith unto them, They that are whole have no need of the physician, but they that are sick: I came not to call the righteous, but sinners to repentance.

And he said unto them, Have ye never read what David did, when he had need, and was an hungred, he, and they that were with him?

And if any man say unto you, Why do ye this? say ye that the Lord hath need of him; and straightway he will send him hither.

Then the high priest rent his clothes, and saith, What need we any further witnesses?