Salamah bin Abi Salamah (may Allah have mercy on him) narrates from his father that it was mentioned in his presence that giving three divorces at one time is disliked. He said: Hafs bin Amr bin al-Mughirah gave Fatimah bint Qays (may Allah be pleased with her) three divorces at one time, and we do not know that the Prophet (peace and blessings be upon him) found fault with it; and Sayyiduna Abd al-Rahman bin Awf (may Allah be pleased with him) gave his wife three divorces and no one objected to him.
Note: Sayyiduna Abdullah bin Abbas, Sayyiduna Abu Hurayrah and Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them) say: Whoever gives his wife three divorces before consummating the marriage cannot marry her again until another man marries her and divorces her. The narrator says: Sayyiduna Abdullah bin Abbas and Sayyiduna Abu Hurayrah (may Allah be pleased with them both) did not object to giving three divorces together, and Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) did not say: You did a bad thing by giving three divorces.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الخلع والطلاق / 14938