He told her that the Father knows exactly when she will need things.
Explanation:
The book "The Hiding Place" was written by Corrie ten Boom in collaboration with John and Elizabeth Sherrill about her experience of the Nazi regime's discrimination against the Jews in the Dutch town of Haarlem. She narrates how she and her family helped their Jewish friends and neighbors to hide from being captured and taken to concentration camps. They encountered lots of difficulties in not only giving these people safe places to hide but also in terms of food supplies. But ever the faithful and devout Christian that they are, her father Casper ten Boom assured her that the Father (God) will provide them with whatever they need whenever he feels. They should not be alarmed or worried about anything as God knows the needs of his people and will help them when he knows they need help. he knows when they need things and will be ever ready to help them and rescue them from any difficulties. So, they should have faith in the workings of God.