James 2:19-27

2:19Thou believest that there is one God; thou doest well: the devils also believe, and tremble.

2:20But wilt thou know, O vain man, that faith without works is dead?

2:21Was not Abraham our father justified by works, when he had offered Isaac his son upon the altar?

2:22Seest thou how faith wrought with his works, and by works was faith made perfect?

2:23And the scripture was fulfilled which saith, Abraham believed God, and it was imputed unto him for righteousness: and he was called the Friend of God.

2:24Ye see then how that by works a man is justified, and not by faith only.

2:25Likewise also was not Rahab the harlot justified by works, when she had received the messengers, and had sent them out another way?

2:26For as the body without the spirit is dead, so faith without works is dead also.