It wasnarrated from Hafsah bint 'Umar that when the call for theSubhprayer was given, the Messenger of Allah (ﷺ) would pray twoshortRak'ah before going to the prayer. (ES)
English reference (ES): Vol. 1, Book 5, Hadith 1145 (ES)
Arabic reference (ES): Book 5, Hadith 1199 (ES)