The priest is bound by the seal of confession not to reveal what he hears.
Священник связан печатью исповеди и не может раскрывать услышанное.
Definitions
The seal of confession refers to the absolute confidentiality that a priest is bound to maintain regarding the sins confessed to him during the sacrament of reconciliation in the Catholic Church. This means that a priest cannot disclose any information learned during confession, under any circumstances, as it is considered sacred and inviolable.