'Necessary' in the Bible

Brethren, it was necessary that the scripture should have been fulfilled, which the Holy Spirit spoke before, by the mouth of David, concerning Judas, who became guide to those who took Jesus;

It is necessary therefore, that of the men who have assembled with us all the time in which the Lord Jesus came in and went out among us,

And Paul and Barnabas spoke boldly and said, It was necessary that the word of God should be first spoken to you; but, since ye thrust it from you, and judge yourselves unworthy of eternal life, lo, we turn to the nations;

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

These things therefore being undeniable, it is necessary that ye should be calm and do nothing headlong.