Twelve Commandments given by an angel to the Holy Apostle Hermas (commemorated May 31): 1. Believe in God; 2. Live in simplicity and innocence; do not speak evil: give alms to all who beg; 3. Love truth and avoid falsehood; 4. Preserve chastity in your thoughts; 5. Learn patience and generosity; 6. Know that a good and an evil spirit attend every man; 7. Fear God and fear not the devil; 8. Perform every good act, and refrain from every evil deed; 9. Pray to God from the depth of your soul with faith that your prayer will be fulfilled; 10. Guard against melancholy, the sister of doubt and anger; 11. Test true and false prophecies; 12. Guard against every evil desire.
This is a summary. In "The Shepherd of Hermas" (chapter 5) a full paragraph of explanation follows each mandate.