Titles and Names of Saints: Servants of Christ
Source: TTT
1 Corinthians 7:22
For he who was a slave when he was called by the Lord is the Lord’s freedman. Conversely, he who was a free man when he was called is Christ’s slave.
Ephesians 6:6
And do this not only to please them while they are watching, but as servants of Christ, doing the will of God from your heart.