誰から聞いたの

who did you hear it from?

→ 誰
phrase Rare #42,764
who did you hear it from? A casual question; the thing heard is often understood from context.
JA: その話、誰から聞いたの?
EN: Who did you hear that story from?

そのやり方、誰から聞いたの?

Who did you hear that way of doing it from?

私とトムが付き合ってるって誰から聞いたの?

Who did you hear from that Tom and I are dating?

素敵な話誰から聞いたの?

That's a lovely story. Who did you hear it from?

— Departures (2008)

その噂、誰から聞いたの?

Who did you hear that rumor from?