‘Umar sent for me... and he mentioned a similar hadeeth. He said: The wealth of Banun-Nadeer was among the fai` that Allah granted to His Messenger for which the Muslims made no expedition with either cavalry or camelry (cf. al-Hashr 59:6). He allocated some of it for his family`s maintenance for one year, and what was left he spent on horses and weapons in preparation for jihad for the sake of Allah, may He be glorified and exalted.
I wanted to ask `Umar something but I did not find a chance, so I waited for two years. Then when we were in Marraz-Zahran, he went to relieve himself, then he came after relieving himself and I poured water for him, I said: O Ameer al-Mu`mineen, who are the two women who helped one another against the Messenger of Allah (ﷺ)`? He said: `A`ishah and Hafsah.
` As mentioned in the Qur`an: `If you two (wives of the Prophet (ﷺ)) turn in repentance to Allâh. (it will be better for you), your hearts are indeed so inclined to oppose what the Prophet (ﷺ) likes); but if you help one another against him (Muhammad (ﷺ)). then verily, Allâh is his Maula (Lord, or Master, or Protector), and Jibril (Gabriel). and the righteous among the believers, and furthermore, the angels are his helpers`
(surah at-Tahreem 66:3)