Sayyiduna Hudhayfah (may Allah be pleased with him) narrates this saying of the Prophet (peace and blessings be upon him): "Soon Allah Almighty will fill (your hands) with non-Arabs before you, and He will make them lions who will not flee; they will strike your necks and devour your spoils."
Al-Bazzar recorded it; its chain contains the narrator Yazid bin Sinan Abu Farwah al-Ruhawi, and he is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الفتن - أعاذنا الله منها / 12378