O ye who believe! Seek help with patient Perseverance and Prayer: for Allah is with those who patiently persevere. And say not of those who are slain in the way of Allah: "They are dead." Nay, they are living, though ye perceive (it) not. Be sure we shall test you with something of fear and hunger, some loss in goods or lives or the fruits (of your toil), but give glad tidings to those who patiently persevere. Who say, when afflicted with calamity: "To Allah we belong, and to Him is our return"- They are those on whom (descend) blessings from their Lord, and Mercy, and they are the ones that receive guidance.

Quranic translation: al-Baqarah verse 153-157