I just posted this in another... Abraham believed was Counted righteousness then did a work to show or prove his faith... Circumcisions.. You can't throw out works.. they prove your faith
The apostate Jews required a sign from some work they performed before they would beleive (have faith) it made the cross the one source of Christian faith to no effect and is why they stumbled over the cross even today.
For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.For the Jews require a sign, and the Greeks seek after wisdom: But we preach Christ crucified, unto the Jews a stumblingblock, and unto the Greeks foolishness; 1Co 1:21
Christ is not a circus seal show us a sign and then we will beleive.Its an eveil generation (natural man that does seek after a sign before thye will have faith
Joh 6:30 They said therefore unto him, What sign shewest thou then, that we may see, and believe thee? what dost thou work?
Signs are for those who rebel,no faith. Prophecy the preaching of the gospel for those who have been born again
1Co 14:22 Wherefore tongues are for a sign, not to them that believe, but to them that believe not: but prophesying serveth not for them that believe not, but for them which believe.