A man who goes out into the desert: does he shorten the prayer or not?

Ash'ath said: I asked al-Hasan and Muhammad: If a man goes out to the countryside for ten days, will he shorten the prayer there? They said: No.

Jabir bin Zayd was asked: If some people go out from their city to the countryside, will they pray two rak'ahs until they return? He said: No; as long as they are staying in the countryside, they will pray the full prayer, whether they go near or far.