Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) said that the Prophet (peace and blessings be upon him) was delivering a sermon on the Day of Sacrifice when a man stood up and said: "O Messenger of Allah (peace and blessings be upon him)! I thought such-and-such was before such-and-such." Then another stood up and said the same. He (peace and blessings be upon him) said to all three: "Do it, there is no harm."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9611