Prayer (Kitab Al-Salat): Details of Commencing Prayer
Dawud :: Book 3 : Hadith 1056
Narrated Abdullah ibn Umar:
Nafi' reported: Ibn Umar made the call to prayer at Dajnan (a place between Mecca and Medina). Then he announced: "Offer prayer in your dwellings:" He then narrated a tradition from the Apostle of Allah (peace_be_upon_him). He used to command an announcer who made the call to prayer. He then announced: "Pray in your dwellings" on a cold or rainy night during journey.