The Family Of Imran - 3:145
No one can die without Allah´s permission. Death has an appointed term. Whoever desires the blessing of this world, We will give him of it, and whoever desires the blessing of the Hereafter, We will give him of it. We will reward those who give thanks.
Related:
The Repentance/9:38
"O you who believe, what has happened to you that when you were told, "Take action in the way of Allah,"you fell to the ground? Are you content with the life of this world instead of the Hereafter? The blessings of the life of this world are little compared to the life of the Hereafter."