He knows neither his whence nor his whither.

他不知, 去。

Let him return to the place whence he came.

让他回他所的地方。

No one knows whence she came.

谁也不知何处。

Whence came this traveler?

这个旅行者儿?

Whence comes this splendid feast?

何以举办如此豪华的宴会?