Was not our forefather Abraham [shown to be] justified (made acceptable to God) by [his] works when he brought to the altar as an offering his [own] son Isaac? You see that [his] faith was cooperating with his works, and [his] faith was completed and reached its supreme expression [when he implemented it] by [good] works. And [so] the Scripture was fulfilled that says, Abraham believed in (adhered to, trusted in, and relied on) God, and this was accounted to him as righteousness (as conformity to God's will in thought and deed), and he was called God's friend. read more.
You see that a man is justified (pronounced righteous before God) through what he does and not alone through faith [through works of obedience as well as by what he believes]. So also with Rahab the harlot -- "was she not shown to be justified (pronounced righteous before God) by [good] deeds when she took in the scouts (spies) and sent them away by a different route?