It wasnarrated from 'Uwaimir bin Ashqar that he slaughtered beforetheprayer, and he mentioned that to the Prophet (ﷺ) who said:
"Repeatyour sacrifice." (AR)
English reference (AR): Vol. 4, Book 26, Hadith 3153 (AR)
Arabic reference (AR): Book 26, Hadith 3273 (AR)