It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "A time will surely come upon people when their hearts will be like the hearts of the non-Arabs." I said: What are the hearts of the non-Arabs? He (peace and blessings be upon him) said: "Love of this world. Their way will be the way of the Bedouin Arabs: whatever provision comes to them, they will put into livestock. They will regard jihad as a loss and zakah as a penalty."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13679