Maliks Muwatta Book 3, Hadith Number 11.

Section : The Adhan During a Journey and Without Wudu.

Yahya related to me from Malik from Nafi that Abdullah ibn Umar called the adhan on a cold and windy night and included the phrase, “Do the prayer in shelter.” Then he said, “The Messenger of Allah, may Allah bless him and grant him peace, used to order the muadhdhin to say, ‘Do the prayer in shelter’ when it was a cold, rainy night “