'By Faith' in the Bible

Then those who responded [by faith] to the words [spoken by Peter and the apostles] were immersed, and about three thousand persons were added to them [i.e., the apostles] on that day.

And by faith in his name hath his name made this man strong, whom ye behold and know: yea, the faith which is through him hath given him this perfect soundness in the presence of you all.

and he asked for letters [of authority] from him to the synagogues at Damascus, so that if he found any men or women there belonging to the Way [believers, followers of Jesus the Messiah], men and women alike, he could arrest them and bring them bound [with chains] to Jerusalem.

And put no difference between us and them, purifying their hearts by faith.

To open their eyes, and to turn them from darkness to light, and from the power of Satan unto God, that they may receive forgiveness of sins, and inheritance among them which are sanctified by faith that is in me.