Surah 42, Ayat 48
The verse refers to the rebel of God who were denying the prophet deliberately. They were punished for their grand sins. In ordinary matters, sometimes God chooses to punish some people, some problems are just to test the people as life is the rest. Some problems are due to misjudgements and wrong decisions. One should ask for forgiveness from God, have patience and find the practical ways to deal with one’s problems.