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"And (He did forgive also) the three [who did not join the Tabuk expedition (whom the Prophet SAW)] left (i.e, he did not give his judgement in their case, and their case was suspended for Allaah's Decision) till for them the earth, vast as it is, was straitened and their ownselves were straitened to them, and they perceived that there is no fleeing from Allaah, and no refuge but with Him, Then, He accepted their repentance, that they might repent (unto Him), Verily, Allaah is the One Who accepts repentance, Most Merciful." [At-Taubah (9):118]

Narrated 'Abdullah bin Amr bin Al 'Aas:

Allah's Apostle stopped (for a while near the Jimar) 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 Hadi (sacrificing animal)." The Prophet said, "There is no harm, go and do the slaughtering now." Then another person came and said, "I forgot and slaughtered (the camel) before Rami (throwing of the pebbles) at the Jamra." The Prophet said, "Do the Rami now and there is no harm." The narrator added: So on that day, when the Prophet was asked about anything (as regards the ceremonies of Hajj) performed before or after its due time, his reply was: "Do it (now) and there is no harm." [The Book of Knowledge Volume 1, Book 3, Hadeeth 83]