That would be Romans 4:5-6; though it doesn't specifically say "faith alone" but "faith apart from works".
So, if faith apart from works isn't alone, what is added to it?
It depends on how you define "faith". Faith is inseparable from hope and love, three cardinal virtues. Faith is never alone.
Rom. 3:20,28; Gal. 2:16,21; 3:2,5,10; Eph. 2:8-9 – many Protestants err in their understanding of what Paul means by “works of the law” in his teaching on justification. Paul’s teaching that we are not justified by “works of the law” refer to the law of Moses or to any legal system that makes God our debtor.
They do not refer to good works done in grace with faith in Christ. This makes sense when we remember that Paul’s mission was to teach that salvation was also for the Gentiles who were not subject to the “works of the law.” Here is the proof:
James 2:24 – compare the verse “a man is justified by works and not by faith alone” to Gal. 2:16 – “a man is not justified by works of the law,” and Rom. 3:20,28 – “no human being will be justified in His sight by works of the law.”
James 2:24 appears to be inconsistent with Gal. 2:16 and Rom. 3:20,28 until one realizes that the Word of God cannot contradict itself.
This means that the “works” in James 2:24 are different from the “works of the law in Gal. 2:16 and Rom. 3:20,28. James is referring to “good works” (e.g.,clothing the naked; giving food to the poor) and Paul is referring to the “Mosaic law” (which included both the legal, moral and ceremonial law) or any works which oblige God to give us payment. Here is more proof:
Rom. 3:20,28; Gal. 2:16 – Paul’s phrase for “works of the law” in the Greek is “ergon nomou” which means the Mosaic law or Torah and refers to the teachings (legal, moral) and works (ceremonial) that gave the Jews the knowledge of sin, but not an escape from sin. We have further proof of this from the Dead Sea Scrolls which provide the Hebrew equivalent (“hrvt ysm”) meaning “deeds of the law,” or Mosaic law. James in James 2 does not use “ergon nomou.” He uses “ergois agathois.”
Therefore, Paul’s “works of the law” and James’ “works” are entirely different types of works. Again, they could never contradict each other because the Scriptures are the inspired word of God.
JUSTIFICATION - Scripture Catholic
1Ti 4:1, Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils;
1Ti 4:2, Speaking lies in hypocrisy; having their conscience seared with a hot iron;
1Ti 4:3, Forbidding to marry, and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth.
Paul is not talking about future Catholics, he is talking about Gnostic infiltrators. The Gnostics didn't fast according to the teachings of Jesus and Paul, they "abstained from meats" because they believed it was evil. The Gnostics "forbid to marry" because they believed the flesh was evil, not in accordance with Jesus and Paul's teaching on celibacy and marriage. Celibacy (only in the Latin rite) is a discipline, not a doctrine, therefore exceptions are made.
A day of abstinence is a day on which Catholics fourteen years or older are required to abstain from eating meat (a food which has historically been symbolic of feasting and festivities because it could not be eaten every day in most historic cultures for economic reasons). By abstaining from this festive food on Fridays, we symbolize our sorrow for our sins on the day on which the Lord Jesus died because of our sins.
A biblical basis for abstaining from meat as a sign of penance for our sins is found in the book of Daniel, where the prophet mourns over the sins of Israel:
"In the third year of Cyrus king of Persia . . . 'I, Daniel, mourned for three weeks. I ate no choice food; no meat or wine touched my lips; and I used no lotions at all until the three weeks were over.'" (Daniel 10:1-3)
Pope Francis on Fasting this Lent
Fast from hurting words and say kind words.
Fast from sadness and be filled with gratitude.
Fast from anger and be filled with patience.
Fast from pessimism and be filled with hope.
Fast from worries and have trust in God.
Fast from complaints and contemplate simplicity.
Fast from pressures and be prayerful.
Fast from bitterness and fill your hearts with joy.
Fast from selfishness and be compassionate to others.
Fast from grudges and be reconciled.
Fast from words and be silent so you can listen.
Pope Francis on Fasting | St. Francis Xavier (sfxmissoula.org)[/QUOTE]