Another good one from the GotQuestions? site.
Question: “What does the Bible say about worry?”
Answer: The Bible clearly teaches that Christians are not to worry. In Philippians 4:6, we are commanded, “Do not be anxious [do not worry] about anything, but in everything, by prayer and petition, with thanksgiving, present your requests to God.” In this Scripture, we learn that we should bring all of our needs and concerns to God in prayer rather than worry about them. Jesus encourages us to avoid worrying about our physical needs like clothing and food. Jesus assures us that our heavenly Father will take care of all our needs (Matthew 6:25-34). Therefore, we have no need to worry about anything.
Read the rest here.