'Necessary' in the Bible

For it is necessary [for] the overseer to be blameless as God's steward, not self-willed, not quick-tempered, not addicted to wine, not violent, not greedy for dishonest gain,

whom it is necessary to silence, whoever are ruining whole families [by] teaching [things] which must not be [taught] for the sake of dishonest gain.

But also our [people] must learn to engage in good deeds for necessary needs, so that they will not be unfruitful.