'Children' in the Bible

And the teaching I gave you, my brothers, was such as I was able to give, not to those who have the Spirit, but to those who are still in the flesh, even to children in Christ.

I’m not writing this to shame you, but to warn you as my dear children.

For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband: else were your children unclean; but now are they holy.

Brethren, be not children in understanding: howbeit in malice be ye children, but in understanding be men.