Musnad Abu Ya'la al-Mawsili 115:90

Ubayd Allah ibn Umar narrated to us, Abd al-A’la narrated to us, he said: Sa’id ibn Abi Arubah narrated to us, from Qatadah, from Anas, who said: Shall I not narrate to you a hadith I heard from the Messenger of Allah, may Allah bless him and grant him peace, saying: "Among the signs of the Hour are that knowledge will be lifted, ignorance will appear, wine will be drunk, adultery will spread, men will decrease, and women will increase, until there is one guardian for fifty women."