'Apostles of Christ' in the Bible

For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ.

Nor of men sought we glory, neither of you, nor yet of others, when we might have been burdensome, as the apostles of Christ.

{Although we could have insisted on our own importance} as apostles of Christ, yet we became infants in your midst, like a nursing mother cherishes her own children.