My source is actually slightly complex and non English but the actual source my source has it from is the actually diary.

The full extract can be found here:

https://alphahistory.com/holocaust/anne-frank-diary-1942-44/

October 9th 1942: “Today I have nothing but dismal and depressing news to report. Our many Jewish friends and acquaintances are being taken away in droves. The Gestapo is treating them very roughly and transporting them in cattle cars to Westerbork, the big camp in Drenthe to which they’re sending all the Jews. Miep told us about someone who’d managed to escape from there. It must be terrible in Westerbork. The people get almost nothing to eat, much less to drink, as water is available only one hour a day, and there’s only one toilet and sink for several thousand people. Men and women sleep in the same room, and women and children often have their heads shaved. Escape is almost impossible; many people look Jewish, and they’re branded by their shorn heads. If it’s that bad in Holland, what must it be like in those faraway and uncivilised places where the Germans are sending them? We assume that most of them are being murdered. The English radio says they’re being gassed. Perhaps that’s the quickest way to die. I feel terrible. Miep’s accounts of these horrors are so heartrending… Fine specimens of humanity, those Germans, and to think I’m actually one of them! No, that’s not true, Hitler took away our nationality long ago. And besides, there are no greater enemies on earth than the Germans and Jews.”