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