The Seven Deadly Sins
Question: What are the seven deadly sins and where are they found in the Bible?
Answer: The Bible does not have a list called 'the seven deadly sins.' A Catholic Church monk around the 4th century A.D. likely started this list. It is not so much a collection of the worst offenses man can commit, as it is a list of what Roman Catholics consider are the worst attitudes that are the basis for all disobedience to the Eternal. The most common list of attitudes considered "deadly" are wrath, greed, lust, pride, envy, sloth and gluttony.
The nearest thing in the Old Testament to a list of seven sins considered deadly is in the sixth chapter of the book of Proverbs. Solomon writes that God hates those who is full of pride, a liar, a murderer of those who are innocent, a person who devises ways to do evil and those who are eager to do wrong. He also hates those who bear false testimony against another person and those who seek to pull people apart through sowing seeds of contention (Proverbs 6:16 - 19).
The only thing clearly in common, however, between the list of what God hates and what Catholic's believe are the worst sins is the attitude of pride.
The New Testament has at least two lists that delineate bad behavior. These lists, once again, are very different from the one in your question. The first list is found in 1Corinthians 6:9 - 10. The apostle Paul states that the following people will NOT receive eternal life - adulterers, thieves, drunkards, extortioners, the covetous and so on.
The second list, found in Galatians 5:19 - 21, again states that those who practice the following will NOT be in God's kingdom - fornication, idolatry, sorcery, outbursts of wrath, those who spread dissensions and heresies, those who have selfish ambitions, those who are contentious, and still others.
Ultimately, the Bible teaches that sins, which it defines as the transgression of ANY of the laws of God, if unrepented of brings the death penalty. We might grade them but God does not, as ANY one of them is deadly!