The Rule of St. Benedict - Chapter 69. The Presumption Of Defending Another In The Monastery

(1) Every precaution must be taken that one monk does not presume in any circumstance to defend another in the monastery or to be his champion,
(2) even if they are related by the closest ties of blood.
(3) In no way whatsoever shall the monks presume to do this, because it can be a most serious source and occasion of contention.
(4) Anyone who breaks this rule is to be sharply restrained.

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