"He decided that all the able-bodied male persons belonging to the tribe should be killed, women and children taken prisoners and their wealth divided among the Muslim fighters. The Prophet (Peace be upon him) accepted his judgement saying that Sa‘d had adjudged by the Command of Allâh. In fact, the Jews deserved that severe punitive action for the ugly treachery they had harboured against Islam, and the large arsenal they have amassed and which consisted of one thousand and five hundred swords, two thousand spears, three hundred armours and five hundred shields, all of which went into the hands of the Muslims. Trenches were dug in the bazaar of Madinah and a number of Jews between six and seven hundred were beheaded therein. Hot beds of intrigue and treachery were thus exterminated once and for all. "
From The Sealed Nectar by Safiur Rahman Mubarakpuri
"The Prophet divided the properties, women, and children of Banu Qurayzah among the Muslims after he had separated one-fifth for public purposes. Each man of the cavalry received two shares, one for himself and one for his horse. On that day, the Muslim force included thirty-six cavalrymen. Sa'd ibn Zayd al Ansari sent a number of Banu Qurayzah captives to Najd where he exchanged them for horses and armour in order to increase Muslim military power.
Rayhanah, a captive woman of Banu Qurayzah, fell to the share of Muhammad, who offered her Islam. But she refused obstinately. Muhammad even offered to marry her, but she preferred to remain his captive. It was her strong attachment to her religion and people which must have prevented her from joining Islam as well as from marrying the Prophet. Her hatred for the Muslims and for their Prophet must have continued. No one had spoken of her beauty as they spoke of Zaynab, daughter of Jahsh, though a slight mention of this could be found in the chronicles. There was some disagreement as to whether she, upon entering the quarters of the Prophet, was asked to wear a veil as the protocol of the Prophet's house demanded, or whether she remained like most other women of the Peninsula without a veil. One thing, however, is certain: namely, she remained in the quarters of Muhammad until her death. "
From The life of Muhammed by MH Haykal