Правило 57 Василия Великого
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Let him who has unwillingly killed ten years old not partake of the holy mysteries. The distribution of ten years for him will be as follows: let him cry for two years, let him spend three years among those who listen, four among those who fall down, and let him stand for a year only with the faithful, and then he will receive holy communion.
(Ap. 65; Trul. 91; Ankyr. 21, 22, 23; Basil Vel. 2, 8, 11, 43, 54, 56; Gregory of Nyssa. 5).
In connection with Rule 56, penance for unintentional murderers is prescribed here, namely ten years.
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