'Needful' in the Bible

but one thing is needful: for Mary hath chosen the good part, which shall not be taken away from her.

Brethren, it was needful that the Scripture should be fulfilled, which the Holy Spirit spake before by the mouth of David concerning Judas, who was guide to them that took Jesus.

But there rose up certain of the sect of the Pharisees who believed, saying, It is needful to circumcise them, and to charge them to keep the law of Moses.

yet to abide in the flesh is more needful for your sake.

and one of you say unto them, Go in peace, be ye warmed and filled; and yet ye give them not the things needful to the body; what doth it profit?