[pinkpanther]

And ibn Kathir got it from ibn Ishaq.

Only you and your Karen interpretations differ from the general muslim
This is an event you couldn't change just like the sook ching massacre but do we hate the Japanese? No we don! I am proud to have an ex Japanese gf 

So don feel shameful of the past my friend...learn to accept the truth and move on!

Quran

The event is referenced in the Quran:

And those of the People of the Book who aided them - Allah did take them down from their strongholds and cast terror into their hearts. (So that) some ye slew, and some ye made prisoners.[Quran 33:26]

Ibn Kathir commentary of the verse in his Tafsir is as follows:

Then the Messenger of Allah commanded that ditches should be dug, so they were dug in the earth, and they were brought tied by their shoulders, and were beheaded. There were between seven hundred and eight hundred of them. The children who had not yet reached adolescence and the women were taken prisoner, and their wealth was seized.[2]

[Ibn Kathir, on Quran 33:26]

According to Ibn Kathir, Quran 33:09 and 33:10 is also related to the Banu Qurayza