It wasnarrated that Ibn 'Umar said:
"On rainy nights or on coldwindynights, the Messenger of Allah (ﷺ) would summon his announcertocall out: 'Perform your prayer at your camps.'" (JA)
English reference (JA): Vol. 1, Book 5, Hadith 937 (JA)
Arabic reference (JA): Book 5, Hadith 990 (JA)