'Necessary' in the Bible

I have not gone back from the commandment of his lips; I have treasured up the words of his mouth more than my necessary food.

And Paul and Barnabas spake out boldly, and said, It was necessary that the word of God should first be spoken to you. Seeing ye thrust it from you, and judge yourselves unworthy of eternal life, lo, we turn to the Gentiles.

For it seemed good to the Holy Spirit, and to us, to lay upon you no greater burden than these necessary things:

Nay, much rather, those members of the body which seem to be more feeble are necessary:

I thought it necessary therefore to entreat the brethren, that they would go before unto you, and make up beforehand your aforepromised bounty, that the same might be ready as a matter of bounty, and not of extortion.

But I counted it necessary to send to you Epaphroditus, my brother and fellow-worker and fellow-soldier, and your messenger and minister to my need;

And let our people also learn to maintain good works for necessary uses, that they be not unfruitful.

For every high priest is appointed to offer both gifts and sacrifices: wherefore it is necessary that this high priest also have somewhat to offer.

It was necessary therefore that the copies of the things in the heavens should be cleansed with these; but the heavenly things themselves with better sacrifices than these.