'Fidelity' in the Bible

Then said Jesus, "This night all of you will stumble and fail in your fidelity to me; for it is written, 'I will strike the Shepherd, and the sheep of the flock will be scattered in all directions.'

In the end all this will be evidence of your fidelity.

Your fidelity to the truth is everywhere known. I rejoice over you, therefore, but I wish you to be wise as to what is good, and simple-minded as to what is evil.

This being so, it follows that fidelity is what is required in stewards.

For, by the practical proof of it which you exhibit in this service, you cause God to be extolled for your fidelity to your professed adherence to the Good News of the Christ, and for the liberality of your contributions for them and for all who are in need,

But I am afraid that, as the serpent in his craftiness deceived Eve, so your minds may be led astray from their single-heartedness and their fidelity to Christ.

but manifesting perfect fidelity and kind feeling, in order to bring honour to the teaching of our Saviour, God, in all things.

For it is an intense joy to me when brethren come and bear witness to your fidelity to the truth--that you live in obedience to the truth.