Regula Benedicti: good works 6 (chapter IV)
The Latin:
26. Caritatem non derelinquere.
27. Non iurare ne forte periuret,
28. veritatem ex corde et ore proferre.
29. Malum pro malo non reddere.
30. Iniuriam non facere, sed et factas patienter sufferre
The English:
26. Not to forsake charity.
27. Not to swear, lest perchance one swear falsely.
28. To speak the truth with heart and tongue.
29. Not to return evil for evil.
30. To do no injury, yea, even patiently to bear the injury done us.