Canon 20
About the 7-year penance for adulterers.
If someone's wife or he himself commits adultery, after 7 years they must come into perfect communion, according to the degrees preceding this.
Greek original
Ἐάν τινος γυνὴ μοιχευθῇ, ἢ μοιχεύσῃ τις, ἐν ἑπτὰ ἕτεσι δεῖ αὐτὸν τοῦ τελείου τυχεῖν, κατὰ τοὺς βαθμοὺς τοὺς προάγοντας.
Parallel canons
Ап.48Трул.879398Карф.102Вас.9213135364648587780Григ.Нисск.4