Philippians 4:6:

Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.

See also:

Peace in a Storm
Objection: God Wants You to Bring SUPPLICATIONS and REQUESTS to HIM (Philippians 4:6), Not to “Take Authority” Yourself
Objection: Teaching Grace Gives People a License to Sin
Condition: Mental Illnesses