DEU 8:16

16 Do not forget that in that desert he gave your ancestors manna to eat, food that they had never eaten before. He [caused them to have/experience many problems/difficulties], because he wanted them to realize that they needed to trust him and not themselves. And he wanted to test them, to find out whether they intended to obey him, in order that when [those difficulties] ended, he would do many good things for them.