Common Biblical Idioms & Their Origins:

 

• A Drop in the Bucket (Isaiah 40:15) - A tiny, insignificant amount compared to the whole.
• Apple of My Eye (Psalm 17:8) - Something or someone very precious and cherished.
• As Old as Methuselah (Genesis 5:27) - Extremely old.
• Ashes to Ashes, Dust to Dust(Genesis 3:19) - A reminder of mortality and return to the earth.
• By the Skin of My Teeth (Job 19:20) - Barely escaping danger.
• Blind Leading the Blind (Matthew 15:14) - Ignorant people leading others to ruin.
• Bite the Dust (Psalm 72:9) - To die or be defeated.
• Cast Pearls Before Swine(Matthew 7:6) - Offering something valuable to those who won't appreciate it.
• Eye for an Eye, Tooth for a Tooth(Leviticus 24:20) - Retaliation or strict justice.
• Fall from Grace (Galatians 5:4) - Losing God's favor or moral standing.
• Fat of the Land (Genesis 45:19) - The best, most fertile resources.
• Feet of Clay (Daniel 2:33) - A hidden weakness in something seemingly strong.
• Fight the Good Fight (1 Timothy 6:12) - Striving for righteousness.
• Forbidden Fruit (Genesis 2:16-17) - Something tempting but prohibited.
• Flesh and Blood (Matthew 16:17) - Human beings, often contrasted with spiritual matters.
• Fly in the Ointment (Ecclesiastes 10:1) - A small flaw ruining something good.
• For Such a Time as This (Esther 4:14) - A specific purpose for a particular moment.
• Good Samaritan (Luke 10:30-35) - A helpful stranger.
• Gird Up Your Loins (1 Kings 18:46) - Prepare for action or hardship.
• House Divided (Matthew 12:25) - A group in conflict with itself.
• Land of Milk and Honey (Exodus 3:8) - A prosperous, abundant place.
• Salt of the Earth (Matthew 5:13) - Worthy, honorable people.
• Scapegoat (Leviticus 16:10) - One blamed for others' sins.
• Sweat of Your Brow (Genesis 3:19) - Hard labor, earning a living.
• Writing on the Wall (Daniel 5:5-6) - An ominous sign of impending doom.
• Wolf in Sheep's Clothing (Matthew 7:15) - A deceptive, dangerous person disguised as harmless. 

Figurative Language in the Bible:
Jesus and prophets frequently used figures of speech like parables, metaphors, and similes to teach spiritual truths, making the Bible a source of many enduring idioms.