Narrated Ibn `Abbas:
I intended to ask `Umar about those two ladies who back each other against 'Allah's Messenger (s.a.w.a.) . For one year I was seeking the opportunity to ask this question, but in vain, until once when I accompanied him for Hajj. While we were in Zahran, `Umar went to answer the call of nature and told me to follow him with some water for ablution. So I followed him with a container of water and started pouring water for him. I found it a good opportunity to ask him, so I said, "O chief of the Believers! Who were those two ladies who had backed each other (against the Prophet)?" Before I could complete my question, he replied, "They were `Aisha and Hafsa."
Narrated Ibn `Abbas:
I had been eager to ask `Umar bin Al-Khattab about the two ladies from among the wives of the Prophet regarding whom Allah said 'If you two (wives of the Prophet (s.a.w.a.) namely Aisha and Hafsa) turn in repentance to Allah, your hearts are indeed so inclined (to oppose what the Prophet (s.a.w.a.) likes). (66.4) till `Umar performed the Hajj and I too, performed the Hajj along with him. (On the way) `Umar went aside to answer the call of nature, and I also went aside along with him carrying a tumbler full of water, and when `Umar had finished answering the call of nature, I poured water over his hands and he performed the ablution. Then I said to him, "O chief of the Believers! Who were the two ladies from among the wives of the Prophet (s.a.w.a.) regarding whom Allah said: 'If you two (wives of the Prophet) turn in repentance to Allah your hearts are indeed so inclined (to oppose what the Prophet (s.a.w.a.) likes)?" (66.4) He said, "I am astonished at your question, O Ibn `Abbas. They were `Aisha and Hafsa."