Abdullah bin Safwan narrates: I heard Hafsah (may Allah be pleased with her), the Mother of the Believers, say that the Messenger of Allah (peace and blessings be upon him) said: "Some people of my Ummah will march against this House (the Ka'bah), until when they reach the place called al-Bayda', the front part of them will be swallowed into the earth, and their middle part will neither return nor escape."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19660