Al-Lu'lu Wal-Marjan 822 — The Book of Hajj (Pilgrimage to Makka)

Abdullah bin 'Amr bin Al-'as Narrated from:

Allāh's Messenger صلى الله عليه وسلم stopped (for a while near Jimâr) at Mina during his last Hajj for the people and they were asking him questions. A man came and said, "I forgot and got my head shaved before slaughtering the Hady (sacrificial animal)." The Prophet صلى الله عليه وسلم said, "There is no harm, go and do the slaughtering now."Then another person came and said, "I forgot and slaughtered (the camel) before Ramy (throwing of the pebbles) at the Jamra." The Prophet صلى الله عليه وسلم said, "Do the Ramy now and there is no harm." The narrator added, "On that day when the Prophet صلى الله عليه وسلم was asked about anything (as regards the duties of Hajj during the days at Mina) performed before or after its due time, his reply was: "Do it (now) and there is no harm." ( Sahîh Al-Bukhârî, Hadîth No. 83, Vol. 1)