'Faithful' in the Bible

to the saints in Colossae, and to the faithful brethren in Christ: Grace to you, and peace from God our Father, and the Lord Jesus Christ!

as ye also learned from Epaphras, our beloved fellow-servant, who is for you a faithful ministrant of the Christ,

All the things concerning me make known to you shall Tychicus -- the beloved brother, and faithful ministrant, and fellow-servant in the Lord --

with Onesimus the faithful and beloved brother, who is of you; all things to you shall they make known that are here.