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. (PT)
English reference (PT): Vol. 1, Book 5, Hadith 1145 (PT)
Arabic reference (PT): Book 5, Hadith 1199 (PT)