'Faithful' in the Bible

[in order] to guard paths of justice and keep the way of his faithful [ones].

A messenger of wickedness will fall into trouble, but an envoy of the faithful [brings] healing.

A faithful witness does not lie, but he who breathes out falsehood is a witness of deceit.

Like the cold of snow on a day of harvest [is] a faithful messenger to those who send him, and the soul of his master is refreshed.