It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The Hour will not be established until saying 'Allah, Allah' has ceased on the earth; and until a woman passes by a sandal, picks it up and says: 'This sandal belonged to a man'; and until only one man remains as the guardian of fifty women; and until the sky rains but the earth grows nothing." This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs did not record it.