The Cow - 2:214
"Or do you think that you will enter Paradise until the like of what happened to those before you befalls you? They suffered hardship and distress and were so shaken that the apostle and those who believed with him said, "When is the help of Allah?"Know well that Allah´s help is near."
Related:
The Family Of Imran/3:142
Do you think that you will enter Paradise until Allah reveals the workers among you and separates those who are patient?
Muhammad/47:31
We will test you and try your qualities until We bring out from among you those who strive and those who persevere against hardship.