It was
narrated from Aswad bin Qais that he heard Jundub Al-Bajali
say:
“I
was present on Adha day with the Messenger of Allah (ﷺ), and
some
people slaughtered before the prayer. The Prophet (ﷺ) said:
‘Whoever among you has slaughtered before the prayer, let him
repeat
his sacrifice, and whoever has not, let him offer his
sacrifice in the
Name of Allah.’”