君父の讐は倶に天を戴かず（くんぷのあだはともにてんをいただかず）

Japanese vocabulary

Meaning: not wanting to live in the same world as one's father's or lord's enemies; being prepared to sacrifice one's life to avenge one's father or lord

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “君父の讐は倶に天を戴かず” pronounced in real videos (YouGlish)