Primo Levi, If This Is A Man.
It's the part when he describes how the Nazis are coming to the mountains for the Italian Jews who have fled there. Many of them are mothers, children and students. They dreamt of starting a resistance group but realised it would he futile because they comprised of, well, mothers, young children and inexperienced, naive students.
He described how, the night before, when they didn't know exactly what was going to happen to them but they knew it wasn't good.
He described how the mothers made packed lunches for the children, washed their clothes and hung them out to dry, bathed them, sang to them and hugged them.
I'm paraphrasing because I don't have the book to hand but the line is something like, "But if you knew your children would die tomorrow, would you still not feed them today?"
The thought of those mothers caring for their children, not aware of the absolute horror that lay ahead but knowing there was something.
It brings a tear to my eye even just thinking about it.