Come, buy wine and milk without money and without price. Why do you spend your money for that which is not bread, and your labour for that which does not satisfy? (Isaiah 55:1–2 ESV)

Do not lay up for yourselves treasures on earth, where moth and rust destroy and where thieves break in and steal, but lay up for yourselves treasures in heaven, where neither moth nor rust destroys and where thieves do not break in and steal. (Matthew 6:19-20)