9:40
If not you help him, certainly, helped him Allah when drove him out those who disbelieved, the second (of) the two, when they both (were) in the cave, when he said to his companion, "(Do) not grieve, indeed, Allah (is) with us." Then sent down Allah His tranquility upon him, and supported him with forces not which you did see, and made (the) word (of) those who disbelieved the lowest, while (the) Word (of) Allah it (is) the highest. And Allah (is) All-Mighty, All-Wise.

18:41
Or will become, its water, sunken, so never you will be able it to find."

67:30
Say, "Have you seen, if becomes your water sunken, then who could bring you water flowing?"

9:57
If they could find a refuge or caves or a place to enter, surely, they would turn to it, and they run wild.