It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "You will be sifted (through tribulations) just as dates are picked out from their rubbish and refuse; your best people will surely depart while your worst people remain. So if you are able to die, then die."
Hadith Referenceالمعجم الأوسط / باب العين / 4676
Hadith Takhrij«أخرجه ابن حبان فى «صحيحه» برقم: 6851، والحاكم فى «المستدرك» برقم: 7981، 8433، 8431، 8432، وابن ماجه فى «سننه» برقم: 4038، والبزار فى «مسنده» برقم: 7801»