に従わなければならない

must obey

→ に
phrase Rare #26,096
must obey A formal expression meaning that someone is required to follow or obey a person, law, rule, custom, or order. に従う means “to follow” or “obey,” and なければならない means “must.”
JA: 会社の規則に従わなければならない。
EN: You must follow the rules.