七度尋ねて人を疑え（ななたびたずねてひとをうたがえ）

Japanese vocabulary

Meaning: search thoroughly for something lost before you suspect someone of stealing it; be on sure ground before you accuse someone

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “七度尋ねて人を疑え” pronounced in real videos (YouGlish)