From Sahih Bukhari (Hadith 1799):
Narrated Ibn `Umar:Whenever Allah's Messenger (ﷺ) left for Mecca, he used to pray in the mosque of Ash-Shajra, and when he returned (to Medina), he used to pray in the middle of the valley of Dhul-Hulaifa and used to pass the night there till morning
Reference: Bukhari 1799