It is narrated from Sayyiduna Mustawrid al-Fihri (may Allah be pleased with him) that he said to Sayyiduna Amr bin al-As (may Allah be pleased with him): "The Hour will be established while the Romans are the most numerous of people." He said: Watch what you are saying! Sayyiduna Mustawrid (may Allah be pleased with him) said: I say only what I heard from the Messenger of Allah (peace and blessings be upon him): "The righteous will depart first, one after another, and only the dregs will remain, like the dregs of dates and barley; Allah will not care about them at all."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17868