It is not permissible to slaughter
the Uddhiyah at Fajr prayer on the day of `Eid, as the prescribed time is to slaughter it after performing the `Eid Prayer or after the period of time equivalent to that regarding those who have no `Eid Salah. It is narrated on the authority of
Jundub Ibn `Abdullah (may Allah be pleased with him) that the Prophet (peace be upon him) (Part No. 11; Page No. 409) said: "
Anybody who slaughters (his sacrifice) before the Prayer should slaughter another animal instead of it...''
and his saying:
"Anyone who prays like us and slaughters the sacrifice like we do, then he acts according to our (Nusuk) tradition of sacrificing, but whoever slaughters the sacrifice before the prayer should slaughter another sacrifice instead of it.''
(Agreed upon by Al-Bukhari and Muslim)
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.