НА ГОРЕ чьё, комуPrepPInvarthe resulting PrepP is sent adv
(of an action or event) resulting in grave consequences (for s.o. or o.s. ): to s.oSs (one's (own)) misfortune
to s.o. fe (one's (own)) grief (sorrow).
Да, показал дед Крессе, на горе Поклену-отцу, его сыну ход в Бургонский Отель! (Булгаков 5). Yes, to the misfortune of Poquelin the elder, grandfather Cresse had shown the boy the way to the Hotel de Bourgogne! (5a).